||Location (Not Relevant: All Work done in single Location Zhuhai, hence it is not a sampling factor.)
Customer (Not Relevant: The same customer type for all basic units, hence is not relevant sampling factor.)
Size (Not Relevant: All projects are almost of the same scale with 6 to 10 developers in the project team, hence is not a relevant sampling factor.)
Organizational Structure (Not Relevant: All team reports to one senior manager and all basic units belong to one technology department, hence is not a relevant factor.)
Type of Work: Different Project Development Type (New product development and Enhancement) is different for all basic units, and developed in the similar technology and hence considered relevant for sampling.