Management competence of the project manager depends on the situation, however:
1. Too many inspections causes lost concentration
2. What is “too many”? It depends on your personal philosophy of conducting projects
3. In reality it means: it takes time!

Developers’ productivity.
1. Focus on time when developer is hired but not working
2. Is there a gap between the end of the last activity and time when s/he left project? It indicates that you has not planned his/her activities!

Consistency of documents.
1. Check, if there is a correct all
2. Check, if there are several “correct all”-s

Distribution of effort.
a. Specification ~ 10-15 %
b. Design ~ 30-40 %
c. Coding ~25-35 %
d. Testing ~ 20-30 %
e. Manuals ~ 10 %

Non-productive time.
Rule of the thumb:
10.000 € – 13.000 € very good, more than
20.000 € is not really good!

About inspections.
1. Permanent inspection is a good idea.
2. There is no optimal number of inspections. However, an increase of the number of inspections might indicate a LOSS of CONTROL.

Correctness of documents
1. The quality should decrease a little bit. However, when quality increases at the level of code, then there has been quite a lot of testing (! Expensive !)
2. When the quality of code is less than the quality of module specifications, there was a problem with the test.

About coding.
You may assign more people for coding! They may work in parallel. Do not care for the distribution of the workload. It is their task.