| Sampling Factors: |
Location (Not Relevant: Only the location of Hangzhou is considered.)
Customer (Not Relevant: Hospital is the only one type of customer)
Size (Not Relevant: Size of projects are comparable.)
Organizational Structure (Not Relevant: Projects are executed in the same organization structure. Differences are also expected to be covered by the factor “Project type”)
Type of Work (Not Relevant: Only development work is considered.)
Project Type: New product development and re-development. Hypothesis test was performed by evaluating process performance in terms of defect density and normalized project effort, against two project types of new development and re-development. The results show there is significant differences for different project types. |
| Sampling Factor Values: |
New Product Development (Project Type): New product development projects.
Re-development (Project Type): Re-development projects |
| Subgroups: |
Subgroup 1: Re-development projects
27 People, 5 Basic Units
– Re-development
Subgroup 2: New development projects
47 People, 9 Basic Units
– New Product Development |