As a time-phased system, MRP makes recommendations to reschedule open orders when due dates and need dates are not in phase. Which concept is this describing?

• A. Capacity planning
• B. Forecasting
• C. Material sourcing
• D. Materials requirement planning (MRP)

Answer: (D)

Materials Requirements Planning is a time-phased approach that converts the master schedule into actionable release dates for purchases and production. It uses data from the bill of materials, lead times, on-hand inventory, and open orders to determine when material should be procured or manufactured. If the planned due dates for finished products and the dates when components are needed are not in sync, MRP recalculates and proposes changes to open orders—shifting start times or rescheduling releases—so that materials are available exactly when required. This rescheduling helps avoid late deliveries and aligns demand with supply across the schedule. The other concepts describe separate functions: capacity planning focuses on whether the plant has enough capacity, forecasting projects demand, and material sourcing focuses on selecting suppliers and obtaining materials. So the described behavior aligns with Materials Requirements Planning.