A Pro-Environmental Method of Sample Size Determination to Predict the Quality Level of Products Considering Current Customers’ Expectations

The main factor that conditions the success of organizations is development products oriented toward customer satisfaction. An additional attribute use sustainable rules. these rules and simultaneous desire to create high-quality encourage apply different methods to, for example, eliminate waste. This study aimed develop a method determine research sample size required predict product’s quality level, taking into account current customers’ expectations. was developed by modifying procedure as part calculated estimator mean value in general population. Based on concept product sustainability development, goal number potential customers (respondents) needed provide requirements, which were then processed used level product. applied simultaneously test hypotheses, power, detect statistically significant differences several relationships sizes power. achieved using universal hypotheses popular alternative-punctual (MAP) method. Testing proposed showed it able based expectations customers.