| Sampling Factors: |
Location (Not Relevant: No effect on implementation. Software development work is performed in only one location: Nanjing.)
Customer (Not Relevant: No effect on implementation. All products are developed for transportation industry.)
Size (Not Relevant: No effect on implementation. All software development projects have less than 15 employees.)
Organizational Structure (Not Relevant: No effect on implementation. It is a small organization unit with very simple organization structure.)
Type of Work (Not Relevant: Only cover development projects)
Type of system: There are two types of system development: Signal control systems, Application operation systems. Two separate PPBs have been maintained. |
| Sampling Factor Values: |
Signal control systems (Type of system): The projects focus on developing signal control systems
Application operation systems (Type of system): The projects focus on developing application operation systems |
| Subgroups: |
G1: The projects focus on developing signal control systems
48 People, 7 Basic Units
– Signal control systems
G2: The projects focus on developing Application operation systems
18 People, 3 Basic Units
– Application operation systems |