A company that produces and sells dishwashers had many complaints recently about the quality of the cleaning of the plates and pots. As a researcher describe in details and clarify the 3 stages of designing the research

1- Research design

2- Sampling design

3- Pilot testing

clarification:

Research design is the blueprint for fulfilling objectives and providing the insight to answer the management dilemma. There are many methods, techniques, procedures, and protocols possible.

A sample is a group of cases, participants, events, or records that constitute a portion of the target population. The researcher must determine whether to choose a probability or nonprobability sample.

A pilot test is conducted to test weaknesses in the research methodology and the data collection instrument and to provide proxy data for selection of a probability sample.