Amdhal's law

The overall performance improvement gained by optimizing a single part of a system is limited by the fraction of time that the improved part is actually used

Summary

As much part of the work can be done in parallel the output will have a high maximum potential. When more people are added the total contention cost will increase superlinearly.

Resolution

Keep workgroups small. (ref The Two Pizza Rule)
Standardize upskilling and training.
Create automated workflows with low collaboration and consensus. Not all collaboration is good ( ref Conway’s law)
In case collaboration is needed do so in a small group. Provide autonomy and independence to the groups. This also helps reduce Extraneous Cognitive Load (ref Cognitive Load Theory)
Empower small groups with all the resources locally.