Route-Map: The project plan offers a road-way that gives direction to the project from start to end.
Documentation of Customer Requirements: A well-articulated project plan enables the record of the requirements of the customers in a documented form. This provides a precise direction instead of relying on assumptions, which could be incorrect and may lead to project errors.
Task Autonomy: Project planning apps enables one to assign tasks to specific team members and gives autonomy. The team feels a sense of responsibility and ownership of the success or failure of a project. Consequently, it urges them to work better or encourages them to bring inconsistent results.
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Resource Estimation: Planning is vital as in a way, it enables us to estimate resources, costing and time. It gives a judgment of any delays if several members are working on various projects at a time.
Mitigation Plan: The project plan gives a way to forecast risks, if any, and plan for mitigation strategies accordingly.
Identification of Employee Capabilities: The planning phase enables to identify employees with certain skill-sets or expertise. And as the tasks get assigned, team members get trained on a lacking skill-sets or either upgraded on the ones they possess.
Strengths and Short-Comings of Previous Projects: Project plans also help to analyze and improve or learn from the previous project records and facilitate decision-making.