What is the major factor that should be considered in project management?

performance quality of the important tasks respecting the delivery time according to the planning

time cash flow cost quality

1.
Clearly defined contracts/SLAs/MOAs.
Communication with the client and project team on a regular basis to ensure that there weren't scope changes, everyone understands what is required and that action items are ticked off.2.
Resource allocation (not to over commit)3.
Cost - look at budget vs actual and do regular projections - especially where there's a difference in currency4.
Integrity in delivering services/goods when agreed to do so with the exception of 'force majeure'5.
Present realistic timelines to the client factoring in risks, constraints and contingencies

Scope, Time & Cost

Scope,Time, Cost