The project approach that is defined and signed off at the start of a project has to be followed by each person involved in the project during the development and execution of a project. It is assumed that initiation phase meets its timelines most of the time and most of the hiccups arise during a project are either during development phase or its execution phase. Progress of a project is measured by means of objectively defined milestones, targets and releases defined with their timelines.
Any timeline anticipated in getting delayed to its execution needs to be alarmed as soon as comes into notice. Appropriate actions need to be taken so as to get the train back on track rather than wasting much time in postmortem of delays happened. Though analysis and in-depth probing is definitely a solid tool for learning of factors that caused delays and helping in future projects in controlling those factors, it can be done post release of major milestones or at a stage when the project is passing through happy state.
Ultimate goal of any project is to get what was planned during initial phases – in right shape, in right time, and of committed quality.