||Location (Not Relevant: All the projects are developed in Zhengzhou city. The location is irrelevant.)
Customer (Not Relevant: All projects have the same category of customers (Rail traffic industry), so the customer is irrelevant.)
Size (Not Relevant: All the development team sizes are under 10 people. The projects have similar size. The size is irrelevant.)
Organizational Structure (Not Relevant: The management structure of the company is very flat and simple,All the projects are not significantly different.)
Type of Work: There are two types of project: 1. Detection system 2. Training System These two types of systems use different development techniques and methods.
|Sampling Factor Values:
||Detection system (Type of Work): The projects are the type of detection system.
Training System (Type of Work): The projects are the type of training system.
Subgroup 1: The projects are the type of detection system.
9 People, 3 Basic Units
– Detection system
Subgroup 2: The projects are the type of training system.
8 People, 2 Basic Units
– Training System