In the house-building network, how long does the foundation take and how long does the frame take?

1. Most of the jobs in building a house cannot start until the foundation and frame are complete. 2. Finishing the foundation takes five days. 3. Erecting the house frame takes another seven days after that. 4. Those two tasks together therefore consume twelve days before most other work can begin. 5. Option B reverses the two durations, which is the easiest error to make here. 6. Getting the order right matters because both tasks lie on the critical path, so any slip in either delays the whole build. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 10 "Achieving World-Class Operations Management", section The Big Picture: Critical Path Method and PERT_