Imposed Date

A constraint that sets a specific calendar date on an activity or milestone, forcing when it may start or must finish, often stated as 'start no earlier than' or 'finish no later than'.

Key Points

  • Represents a mandated timing constraint from a sponsor, customer, contract, regulation, or internal policy.
  • Limits scheduling flexibility and can reduce or create negative float if it conflicts with network logic.
  • Common forms include 'start no earlier than' (SNET) and 'finish no later than' (FNLT); other variants may also be used.
  • Should be used sparingly, justified, documented with the source, and reflected in the schedule baseline.

Example

A city permit allows lane closures only from June 1 onward. The paving activity is assigned a 'start no earlier than' June 1 constraint. Separately, the marketing launch must happen by October 15, so the launch milestone is given a 'finish no later than' October 15 imposed date.

PMP Example Question

A sponsor requires the beta demo to occur no later than June 30. How should the project manager model this in the schedule?

  1. Apply a 'finish no later than' imposed date to the demo activity.
  2. Add a lead to the predecessor activity to accelerate the demo.
  3. Increase resource allocation to compress the schedule.
  4. Add a milestone without any constraints and monitor it weekly.

Correct Answer: A — Apply a 'finish no later than' imposed date

Explanation: An imposed date is a calendar constraint that enforces a specific latest finish or earliest start. Option A directly models the sponsor's requirement.

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