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Article

Quality Management Systems and Working Capital SMEs in GPO—A Case of Poland

1
Department of Finance, Banking and Accountancy, The Faculty of Management, Rzeszow University of Technology, 35-959 Rzeszow, Poland
2
Department of Management Systems and Logistics, Rzeszow University of Technology, 35-959 Rzeszow, Poland
*
Author to whom correspondence should be addressed.
Submission received: 10 August 2020 / Revised: 23 September 2020 / Accepted: 24 September 2020 / Published: 1 October 2020

Abstract

:
Working capital is designed to provide enterprises with financial security. Its level depends on the strategy of managing individual elements of working capital. An appropriate management strategy allows companies to obtain added working capital. Working capital management is a difficult process as it concerns both current assets and current liabilities. Therefore, company managers are constantly looking for solutions, methods and tools that will help them to manage their working capital. A quality management system is the one that facilitates control over the management of individual elements that create net working capital. The introduction of appropriate procedures derived from quality management systems in specific areas is a great support for creating a positive net working capital. The aim of this paper is to show how the introduction of quality management systems can positively affect the level of working capital. The article presents how quality management systems allow for optimizing the level of individual components, creating a positive net working capital. The research was carried out on a group of 102 Polish small trading companies operating in the same industry. The enterprises were divided into two groups of companies applying the quality management system and of those that did not use such systems. Based on the financial statements for the years 2017–2019 and by means of appropriately selected financial ratios, an analysis of the impact of quality management systems on net working capital was carried out. The results in some areas of management of individual components of net working capital in different groups of enterprises were compared. The research was carried out with the application of appropriate statistical methods. The analysis showed that enterprises using quality management systems managed working capital more efficiently. In the literature, the subject of the impact of quality management systems on working capital is not popular. This paper may be a source for further, extended research and considerations regarding the impact of quality management on the level of working capital in enterprises.

1. Introduction

Management of net working capital is the management of the company finances in the short term. The basic level of net working capital in an enterprise is influenced by two basic elements, namely current assets and current liabilities. These two basic elements consist of a number of components that create current assets and short-term liabilities. Managing these components is a process that continues without interruption. The decisions regarding the sale of goods, materials, purchase organization and inventory management are a continuous process and are closely related to working capital. When simplifying, working capital management is used to determine the appropriate level of current assets and short-term liabilities as well as their structure. It can be stated that it is the result of developed management strategies for individual elements affecting the level of working capital. The problem with working capital management is to determine its optimal level. In an enterprise, working capital can be positive, negative or theoretically zero. Ideally, a company should have positive working capital, which is, in a sense, a buffer that protects it from losing financial liquidity. However, when the level is too high, this may lead to unjustified freezing of cash in current assets. A low level is the risk of problems with settling current liabilities. Therefore, there is a problem with determining the optimal value. To achieve this level, it is worth using appropriate measures that will allow comparison of the demand for working capital in a given period with its level. However, it should be remembered that lowering the level or increasing the level of net working capital refers to decisions that are most often made in the area related to receivables from customers, inventories or liabilities to suppliers. Actions taken by a company in a given area can actually result in setting a model level of working capital, but they can also generate unjustified costs. In the case of managing receivables from customers, some steps may be taken to speed up the process of collecting receivables. This can cause the loss of contractors who will choose a different supplier with a better trade credit offer. Shortening the repayment period may be costly if the company in return has to finance its operations with a more expensive bank loan. Its extension beyond the payment deadline in turn entails the risk of the appearance of penalty interest. In the area of warehouse management, switching to the Just in Time method carries the risk of holding up production or sales when there are shortages of materials for production or goods for which there is a demand.
Therefore, the working capital management process is very complicated and is fundamental for building the financial security of enterprises. The subject of working capital management, and thus the management of trade credit and risk in SMEs, is currently a subject that is being extensively discussed in studies on the V4 countries (Cicea et al. 2019; Kontus and Mihanovic 2019; Ključnikov et al. 2019; Otrusinova and Kulleova 2019; Sofiina 2020; Susilowati et al. 2020). This is due to the fact that there are developing markets and substantial foreign concerns regarding these markets, which increases competition in virtually every industry. This is especially dangerous for SMEs and therefore it is so important for these companies to create appropriate working capital management strategies that will ensure their financial security. An increase in competition in the market, the uncertain economic situation and the specter of the expansion of trade conflicts on the US–China route mean that business managers introduce certain methods and tools that will ensure a positive level of net working capital. Some enterprises start operating together in the market within multi-stakeholder organizations. This cooperation allows enterprises to raise the level of net working capital (Zimon 2018; Dhole et al. 2019). There are enterprises that introduce quality management systems to improve the management of individual elements affecting the amount of working capital. This is to improve the management process, mainly inventory or the process of debt collection. In general, quality management systems bring tangible results in manufacturing enterprises. In commercial enterprises, their usefulness is lower and difficult to assess. On the other hand, in the case of small commercial enterprises, it is very difficult to investigate because few commercial units decide to introduce quality management systems. Standardized quality management systems undoubtedly affect many aspects affecting the financial situation of enterprises (Chatzipetrou and Moschidis 2017). This is due to the fact that quality management organizes the functioning of key processes in enterprises, minimizes the number of errors, reduces the costs of the so-called “poor quality” and supports the effective implementation of tasks (Chiarini et al. 2020; Dellana et al. 2019; Woźniak 2019; Fonseca and Domingues 2018). On the other hand, standardized systems of quality management generate certain costs related to their implementation, maintenance and improvement (Chountalas et al. 2020; Zimon and Dellana 2020). There are studies on the influence of systems in the literature on the subject of quality management on the financial efficiency of the organization (Mokhtar and Muda 2012; Aarts and Vos 2001; Kafel and Simon 2017). However, the results of this research are quite general and it is difficult to clearly define on their basis the degree of influence of systems on particular aspects of financial management. It is therefore necessary to conduct more in-depth research on the impact of standardized quality management systems for operation of particular aspects of financial management. The research gap is constituted by a small number of studies on the impact and assessment of the introduction of various types of quality management systems on the financial situation of enterprises, especially those smaller units belonging to the SMEs (small-and medium-sized enterprises) sector. The authors try to prove whether companies using quality management systems manage working capital more effectively.
Working capital is a buffer that protects the enterprise against collapse. It allows one to generate certain funds, reserves that ensure the continuity of functioning in the market. Today, during COVID-19, the units that did not have positive working capital are certainly experiencing difficulty in staying in the market. There are many studies where the authors claim that, without a rational policy of working capital management, it is almost impossible to develop a company (Garcia-Teruel and Martinez-Solano 2007; Deloof 2003).
In view of the above, the purpose of this article is to assess the impact of quality management systems on the level of net working capital in enterprises forming group purchasing organizations (GPOs). The analysis was carried out on a group of 102 commercial enterprises operating in branch GPOs.

2. Literature Review

When analyzing the literature in the area of working capital management, one can find information that it has a direct impact on the liquidity of the enterprise (Kim et al. 1998; Opler et al. 1999; Troilo et al. 2019; Corsten and Gruen 2004; Chiou et al. 2006), profitability (Deloof 2003; Ukaegbu 2014; Peng and Zhou 2019) and solvency (Berryman 1983; Peel and Wilson 1994; Magni and Marchioni 2020; Pirttilä et al. 2020; Fazzari and Petersen 1993; Song et al. 2020; Sandberg and Mena 2015). Working capital can be a competitive advantage for companies. In recent years, large corporations have discovered that there are important cash flow streams which they can access if they aggressively manage their working capital accounts (accounts receivable, inventory, settlements and advances (Chauhan 2019; De Almeida and Eid 2014; Chen and Kieschnick 2018; Dalci and Ozyapici 2018). There are authors who claim that working capital allows companies to survive during a crisis (Kasiran et al. 2016; Ding et al. 2013; Tsuruta 2019; Mahmoudzadeh et al. 2018; He et al. 2017).
Working capital management is important because it enables enterprises to free up cash and improve liquidity (Dhole et al. 2019). K. Smith suggests that working capital decisions affect the efficiency and effectiveness of a company (Smith 1980). There are authors who claim that optimal working capital provides financial resources for the ongoing functioning of enterprises (Bian et al. 2018). However, above all, what is important is that efficient working capital management allows for reducing costs and improving profitability (Chauhan 2019). In addition, the research on working capital management showed that higher levels of working capital allowed companies to increase sales (Baños-Caballero et al. 2012, 2014; Almeida and Campello 2007). The authors also state that positive working capital allows for obtaining larger discounts in the case of earlier payments (Deloof 2003). These additional discounts help to improve the competitive positions of enterprises, so they are very important in a situation whereby the entity is fighting hard for a new contractor or is trying to maintain a regular customer. In general, functioning within branch group purchasing organizations allows enterprises to take advantage of such offers (Zimon 2018; Zimon and Zimon 2019a). A high level of working capital definitely increases the financial security of enterprises. However, maintaining a very high level entails costs, and it reduces the profits and profitability of the company. There are authors who argue that too high levels of net working capital are in turn just unnecessary, unreasonable costs that the company incurs, which negatively affect the financial result. Bank loans, which are often the source of financing enterprises, are often the main source of financing working capital for many companies (Chen and Kieschnick 2018). Some authors claim that additional financial costs increase the probability of bankruptcy (Kieschnick et al. 2011). It is difficult to disagree with the fact that loans increase costs, but the impact of financial costs on the collapse of enterprises is rather small. In turn, Wang (Wang 2002) states that companies from Japan and Taiwan with a high market position try to maintain low levels of net working capital. This is why it is very important when managing working capital to find appropriate management strategies and methods that will facilitate the control of individual components of working capital. Quality management systems and operations within branch group purchasing organizations can be such methods (Zimon 2017a). They can improve the process of managing receivables and inventories.
In addition, the application of quality management systems and the introduction of appropriate procedures allows for streamlining of control processes in the area of receivables, inventories and liabilities. Enterprises using these two methods are able to optimize their working capital management strategies to the one that is right at the moment. In the literature, one can find studies where the authors claim that the introduction of TQM (Total Quality Management), Six improves the functioning of enterprises. The improvement can be seen in processes such as the speed and accuracy of credit approval processes from 24 to 48 h to a few minutes; full digitization of credit application, approval and invoicing processes without paper; reduction in maintaining sales force records and adherence to processes to increase actual sales time with customers to increase efficiency, making suppliers responsible for inventory availability in warehouses and introducing asset utilization control programs that improved the efficiency of working capital management (Boisjoly et al. 2020).
To date, there are many studies in the literature in which the authors claim that the operation of GPO allows cost reduction (Yang et al. 2017; Blair and Durrance 2014; Nollet et al. 2017) In general, the studies on the functioning of GPO were carried out on large companies operating in the medical industry (Burns and Lee 2008; Hu and Schwarz 2011; Marvel and Yang 2008; Cowan et al. 2016; Zimon 2017b). There are few studies that have analyzed other sectors. There is research in which authors analyze the functioning of GPOs operating in the aviation or automotive industry in terms of cost optimization (Dana 2012). However, in general, in many studies, the authors give maximization of profits thanks to the use of the scale effect as the most important goal of the functioning of GPO units (Schotanus and Telegen 2007; Rozemeijer 2000). In Poland, enterprises operate within the framework of the GPO, especially in the construction industry, primarily to provide SMEs protection against foreign concerns entering the Polish market. Large foreign enterprises are rapidly gaining in the Polish market and quite quickly their entry is leading to the bankruptcy of small weak entities. The construction industry is particularly exposed to such a situation, which is why the first GPOs began to be established in Poland in the 1990s. Of course, the economies of scale and cooperation within GPO, apart from improving financial security, positively affect the financial results of individual units.

3. Research Methodology

The research sample included 102 enterprises operating in two Polish branches of group purchasing organizations. The research covered construction industry companies belonging to the largest purchasing groups in Poland whose activities in purchasing groups were formalized and proven. There were 170 enterprises meeting these requirements. The feedback was obtained from 102. When analyzing the data, it was assumed that the companies that did not disclose their data did not differ significantly in terms of financial results from the companies from which the data were obtained. This assumption underlies, in principle, all partial surveys where there was a “refusal to answer” in some cases. The five oldest purchasing groups in Poland were selected which operated in the industry closely related to the trade in heating and sanitary equipment. Entities operating in the construction industry are particularly exposed to the risk of bankruptcy. On the other hand, GPOs are considered to be organizations that improve operational safety; therefore, research was undertaken in this group of enterprises.
The analyzed enterprises were divided into units that introduced various types of quality management systems. It was a group of 38 enterprises. The second group consisted of 64 companies that did not decide to use quality management systems. Additionally, the group of enterprises using quality management systems was divided into two groups depending on the level of sales. The first group, referred to as A, consisted of 7 enterprises that could be described as large; their average turnover exceeded EUR 2 million. The second group consisted of 31 companies with a turnover lower than EUR 2 million. The tests were performed using appropriate statistical methods.
The level of financial ratios in both groups was compared. The results include a compilation of descriptive statistics (mean, median and standard deviation) in each group and an assessment of the significance of differences between the groups using the non-parametric Mann–Whitney test. The choice of the non-parametric test was dictated by quite clear deviations from the normal distribution of some indicators. The Spearman’s rank correlation coefficient was also used for the analysis.
On the basis of the conducted research, there were identified those elements which were significantly affected by quality management systems. The areas where quality management systems had no impact were also presented. The analysis was made on the basis of financial data for the years 2017–2019.

4. Results

The conducted analysis showed that all enterprises in the analyzed period had positive net working capital. This can be confirmed by the results of the current financial liquidity ratio, which is closely related to the level of net working capital. The detailed results are presented in Table 1.
These results confirm that all enterprises have a positive level of net working capital. However, very often, it definitely exceeds the demand for it. While analyzing the results in terms of the demand for net working capital and its actual state, some differences were observed. In both groups, higher working capital levels were observed as compared to the demand. The detailed results between the actual condition and demand are presented in Table 2.
In the majority of enterprises using quality management systems, the level of net working capital slightly exceeds the demand. In enterprises that do not use this system, the difference between actual demand and real ownership is clear. It can, therefore, be concluded that a company using quality management systems manages its net working capital better. Next, the efficiency of managing the most important elements of working capital was assessed. To this end, the operating cycle indicator was used. The detailed results are presented in Table 3.
When assessing the results presented in Table 3 regarding the operational cycle, it is evident that they effectively manage the key elements creating working capital of companies using quality management systems. Details are presented in Table 4 below.
The next part of the analysis was intended to answer the question of whether the introduction of quality management systems had a significant impact on the basic elements shaping the level of net working capital. The tests were performed using appropriate statistical methods. In tables of descriptive statistics characterizing the distribution of ratios in both groups in particular years, there were such measures as average, standard deviation, median and minimum and maximum. When interpreting the results, it is worth paying attention not only to the average level of ratios in the compared groups but also to the median.
The analysis of turnover ratios for short-term receivables in days, inventories in days and short-term liabilities in days was carried out. The results for the receivables turnover rate in days for 2017 and 2019 was higher in the group of enterprises not using quality management systems; the difference between both groups was close to the level of statistical significance (p = 0.0820). The detailed results are presented in Table 5. The enterprises that do not use quality management systems in the research chapter are marked as group A. The enterprises which use quality management systems in the research chapter are marked as group B.
When assessing the receivables turnover in days, it can be seen that higher results were obtained by entities that do not use quality management systems. The enterprises using quality management systems manage receivables more effectively.
Large differences in the level of averages were observed in the case of the analysis of the liabilities turnover ratio in days (they are not statistically significant as they are relatively small in relation to the variability range of this indicator in each group—standard deviations are large in relation to the difference between groups). However, the presented results indicate that they are quicker to regulate the obligations of the companies using quality management systems. The details are presented in Table 6.
Inventories were the last of the analyzed items directly affecting financial liquidity. In the case of inventory turnover in days, no statistically significant differences were observed. The detailed results are presented in Table 7.
The next stage of the research was the division of enterprises using quality management systems according to the turnover. On the basis of the obtained results, it can be concluded that the following ratios are significantly higher in group A of enterprises: financial liquidity, CCC, working capital in current assets and quick ratio (for this ratio, the difference is close to statistically significant) and a lower level of liabilities in group A of enterprises. The detailed results are presented in Table 8.
The chart shows the values of descriptive statistics for selected indicators for which there was a significant difference between the two groups (Figure 1).
The next step was to analyze the correlation in the group of 38 analyzed enterprises using quality management systems.
In group A (for seven companies), the correlations between the working capital in current assets ratio and other important indicators—ROS, CCC, financial liquidity and operation cycle—were examined. Spearman’s rank correlation coefficient was used for the analysis. The table shows the values of the correlation coefficient along with the assessment of its statistical significance.
The working capital in current assets ratio was very closely related to financial liquidity (rS = 0.86). Working capital was closely related to the management of working capital, which was confirmed by an overdue analysis. Only this correlation was statistically significant (p = 0.0137 *). The correlations of working capital in current assets with the other indicators considered in Table 9 were slightly weaker (rS ok. 0.60), but due to the lack of statistical significance, they could not be subjected to deeper interpretation.
The scatter plot (Figure 2) shows the only statistically significant correlation between share of working capital in financing of current assets and financial liquidity.

5. Discussion

The disadvantage of the analysis is the small test sample. However, it covers 90% of enterprises operating in branch group purchasing organizations that form commercial enterprises. There are many other GPOs in Poland related to this branch, but they also include units from other industries. These types of groups are referred to as multi-branch groups. There are major differences in the management of enterprises that operate in such groups, which is why multi-branch purchasing groups were not included in the conducted research.
There are few publications in the literature on the impact of quality management on the level of working capital (Zimon and Zimon 2019). There is also not much information on the impact of quality management systems on individual components of working capital. In the literature, one can find information on trade credit, which is closely related to receivables from recipients and the issue of the quality of the products sold. According to Long and co-authors (Long et al. 1993), trade credit can be used to distinguish between high- and low-quality products. The literature states that commercial credit is provided by reliable companies whose customers can verify the quality of products before making payments. So, according to this theory, cash payments appear when low-quality goods are sold.
It is worth carrying out further research on enterprises operating in other branches to assess how quality management systems affect the working capital and financial security of enterprises.

6. Conclusions

The conducted research is an introduction to further research on the impact of quality management systems on the level of net working capital. The analysis concerned commercial enterprises operating in branch group purchasing organizations and showed that there were some differences in the level of net working capital in the analyzed groups of enterprises. Capital management is run more efficiently by the enterprises that are supported by a quality management system. This is confirmed by the results regarding the level of working capital and operating cycle. A detailed analysis of the more significant elements affecting the level of net working capital showed that statistically significant differences were observed in the area of short-term receivables management. The units that use quality management systems are faster in pursuit of receivables from customers compared to enterprises that do not use such systems. In the case of inventory management, there were virtually no differences. In the area of managing short-term liabilities, large differences appeared.
In summary, companies with quality management systems charge their receivables faster and therefore have cash with which to pay liabilities to suppliers. They regulate liabilities often before the deadline, which allows them to obtain an additional discount, which reduces costs significantly. Favorable changes can be seen in the most important cost item in commercial enterprises, i.e., the value of sold goods at the purchase price. Cost reduction has a positive effect on profits. If the owners decide to leave some of the profits in an enterprise, then the level of equity that funds the company’s assets increases. As a result, positive working capital appears in this group of companies. However, the trick is to keep it at the optimal level. The conducted analysis showed that support for managing the working capital of the quality management system enabled the enterprise to optimize its level in comparison to commercial enterprises that did not decide to implement such management systems.
The analysis carried out in the group of enterprises applying quality management systems showed that the enterprises generating high turnover achieved higher results in the case of financial liquidity ratios, quick ratio, CCC and share of working capital in financing of current assets. Therefore, it can be concluded that the introduction of quality management systems in larger enterprises results in an increase in the financial security of the enterprise. In larger enterprises, the implementation of quality management systems strengthens the management control process of individual areas of the enterprise. The responsibility of employees increases. Very often, ISO 9001 is delegated to employees who only use this system in the enterprise and do not have additional duties. In smaller companies, quality management is often an additional task assigned to an employee. Certainly, this approach makes it difficult to control quality management systems.
A very good example of effective management is the liability turnover ratio in days. Here, the difference between the two groups is clear: liabilities are settled faster in large units. These companies more often and to a greater extent benefit from the economies of scale, joint purchases, which is why they often receive discounts for early payment which they use.
The conducted analysis shows that companies that use quality management systems are able to optimize the level of working capital, which will certainly lead to the improvement of financial results, which constitutes the foundation for further development of enterprises.
The results presented in the article should, however, be treated with a degree of caution since improved financial performance could be attributed to many reasons other than quality management systems certification. Nevertheless, our findings and those of similar researchers do support the view that careful design and implementation of consistent and documented quality management systems contributes to superior financial performance.
Suggestions for future research focus on the evolutionary rather than the revolutionary nature of ISO standard implementation within firms and their supply chains. It is also worth conducting research on the impact of such standards as ISO 50001 or ISO 14001.

Author Contributions

Conceptualization, G.Z.; methodology, G.Z.; formal analysis, G.Z.; data duration, G.Z.; writing—original draft preparation, G.Z. and D.Z.; writing—review and editing, G.Z. and D.Z. All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Conflicts of Interest

The authors declare no conflict of interest.

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Figure 1. Comparison of CCC and liabilities in group A and B.
Figure 1. Comparison of CCC and liabilities in group A and B.
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Figure 2. Correlation between share of working capital in financing of current assets and financial liquidity.
Figure 2. Correlation between share of working capital in financing of current assets and financial liquidity.
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Table 1. Average results for current financial liquidity ratios in 2016–2018.
Table 1. Average results for current financial liquidity ratios in 2016–2018.
Current Financial Liquidity RatiosEnterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
20173.011.832.880.789.02.412.120.611.507.10.4922
20183.271.943.011.0014.52.462.330.621.408.20.5067
20193.191.993.031.2016.32.332.091.081.2011.20.5102
p-value from Mann–Whitney test. Source: author’s own study.
Table 2. Level of working capital (in days).
Table 2. Level of working capital (in days).
Level of Working CapitalEnterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
2017–201923.421.17.2144311.210.911.38320.1336
p-value from Mann–Whitney test. Source: author’s own study.
Table 3. Average results for the operating cycle ratio (in days).
Table 3. Average results for the operating cycle ratio (in days).
Operating Cycle RatioEnterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
201714714126.29420913012225.4801900.2354
201815213727.99821213112123.8831770.1909
201915413826.19020313312622.5791680.2001
p-value from Mann–Whitney test. Source: author’s own study.
Table 4. Cash conversion cycle (CCC in days).
Table 4. Cash conversion cycle (CCC in days).
CCCEnterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
2017676032.519145524229.5101440.5033
2018685833.117150564827.1221170.4945
2019716331.718141584727.4301280.5137
p-value from Mann–Whitney test. Source: author’s own study.
Table 5. Average results for receivables turnover rates in days.
Table 5. Average results for receivables turnover rates in days.
Receivables Turnover Rates in Days Enterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
2017–201977.473.824.82014864.557.320.416820.0820
p-value from Mann–Whitney test. Source: author’s own study.
Table 6. Average results for the liabilities rotation ratio in days.
Table 6. Average results for the liabilities rotation ratio in days.
Liabilities Rotation Ratio in Days Enterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
2017–201984.372.821.63814752.652.217.441980.2019
p-value from Mann–Whitney test. Source: author’s own study.
Table 7. Average results for the inventory turnover ratio in days.
Table 7. Average results for the inventory turnover ratio in days.
Inventory Turnover Ratio in DaysEnterprisesp
Enterprises That Do Not Use Quality Management SystemsEnterprises That Use Quality Management Systems
x ¯ MesMinMax x ¯ MesMinMax
2017–201978.370.918.34812957.648.816.740950.4014
p-value from Mann–Whitney test. Source: author’s own study.
Table 8. Descriptive statistics for financial indicators in both groups with results of Mann–Whitney test.
Table 8. Descriptive statistics for financial indicators in both groups with results of Mann–Whitney test.
Financial IndicatorsGroup A (N = 7)Group B (N = 31)p
MeanMedianStd. dev.MeanMedianStd. dev.
Financial liquidity2.532.530.861.891.371.840.0152 *
Operation cycle (days)133.9126.034.0139.7142.335.10.6852
CCC (days)74.885.035.440.934.034.80.0295 *
ROS (%)3.72.73.13.01.33.00.6852
Working capital in current assets (%)57.466.317.435.329.725.20.0239 *
Quick1.231.300.471.000.731.010.0586
Receivables (days)61.261.518.578.283.332.10.2193
Inventories (days)72.664.519.161.564.324.40.4158
Liabilities (days)59.162.412.298.891.041.80.0082 **
p-value from Mann–Whitney test. *, **.
Table 9. Correlation analysis of the share of working capital in financing of current assets ratio with other selected financial indicators.
Table 9. Correlation analysis of the share of working capital in financing of current assets ratio with other selected financial indicators.
Other Financial IndicatorsShare of Working Capital in Financing of Current Assets (%)
rSp
Financial liquidity0.860.0137
Operation cycle (days)0.640.1194
CCC (days)0.680.0938
ROS (%)0.560.1950
rS—Spearman correlation coefficient; p—assessment of statistical significance.

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Zimon, G.; Zimon, D. Quality Management Systems and Working Capital SMEs in GPO—A Case of Poland. Adm. Sci. 2020, 10, 76. https://0-doi-org.brum.beds.ac.uk/10.3390/admsci10040076

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Zimon G, Zimon D. Quality Management Systems and Working Capital SMEs in GPO—A Case of Poland. Administrative Sciences. 2020; 10(4):76. https://0-doi-org.brum.beds.ac.uk/10.3390/admsci10040076

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Zimon, Grzegorz, and Dominik Zimon. 2020. "Quality Management Systems and Working Capital SMEs in GPO—A Case of Poland" Administrative Sciences 10, no. 4: 76. https://0-doi-org.brum.beds.ac.uk/10.3390/admsci10040076

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