||Location (Not Relevant: No process difference with project locations. One location, Qingdao city.)
Customer (Not Relevant: The customers of the projects are same, all are enterprises.)
Size (Not Relevant: No difference in practice-implementation as per the size, all projects have a similar size in each subgroup.)
Organizational Structure (Not Relevant: One organization structure. All projects are under the same command chain.)
Type of Work: Practice implementation are different in project types, there are product maintenance projects and product development projects.
|Sampling Factor Values:
||Maintenance (Type of Work): The project in this type applies small changes for the enhancement and/or fix bugs on an existing system.
Development (Type of Work): The project in this type develops a new system.
SUB1: The project in this subgroup performs the enhancement and/or fixes bugs for the existing system.
16 People, 2 Basic Units
SUB2: The project in this subgroup develops a new system.
8 People, 1 Basic Units