||Location (Not Relevant: All services are delivered in Mexico City, so location is not a relevant factor)
Customer: Hypothesis testing of the performance parameters indicates that Customer is a relevant sampling factor.
Size: Hypothesis testing of the performance parameters indicates that Size is a relevant sampling factor.
Organizational Structure (Not Relevant: All work is performed by the same group of people, so Org Structure is not a relevant factor)
Type of Work (Not Relevant: All work is maintenance, so Type of Work is not a relevant factor)
|Sampling Factor Values:
||Government (Customer): Government projects
Private (Customer): Private projects
Large (Size): Large projects
Medium (Size): Medium projects
LGov: Large government projects
278 People, 5 Basic Units
MPriv: Medium private projects
200 People, 3 Basic Units