How to manage a Project...???

Every person add different dimensions to attributes of Project Success - like time, cost, scope, quality, safety etc. Ultimately all of these are CONSTRAINTS to be understood and worked within. Hence Managing Constraints are the first Step to success.
Next is what we call RISKS (Known Unknown + Unknown Unknown) or other called Uncertainties, Threats, Opportunities.
Every decision in a project is not 100% PERFECT. This is becos they rely on certain ASSUMPTIONS made during such Decisions Making events.
If such Assumptions are VALID then they turn out to be OPPORTUNITIES to be Exploited and if they turn out to be INVALID then it poses a THREAT.
Beware RISK = OPPORTUNITIES + THREAT.
Hence we have to continuously VALIDATE our ASSUMPTIONS..
Hence, "Manage Constraints + Validate Assumptions = Project Success ...!!!"