An effective schedule is one that is realistic, collaborative, and accepted by key stakeholders involved in project execution.
* Gaining consent and agreement ensures buy-in, facilitates implementation, and minimizes disputes (Option B).
* Frequent updates (Option A) are essential for tracking but are insufficient without team agreement.
* Contract specifications (Option C) govern compliance but do not guarantee effective field use.
* Large contingencies (Option D) may reduce accountability and create inefficiencies in project management.
Collaboration and stakeholder involvement, as emphasized in the PSP Study Guide, are essential for schedule usability.