What is the frozen time fence in the process of scheduling and managing the execution...

According to the ASCM CTSC Exam Content Manual, the frozen time fence is defined as “a point in time within the planning horizon of the master scheduling process that marks a boundary inside of which no changes can be made to the schedule without senior management approval” (p. 18). The frozen time fence helps to protect the production plan from disruptions and uncertainties, and to ensure the stability and reliability of the supply chain. The frozen time fence is usually set at the cumulative lead time of the product, or the time required to procure or produce the product from scratch. The other options are not related to the concept of the frozen time fence.