MB-330 Implement Master Planning Practice Question
A company uses Dynamics 365 Supply Chain Management. They have a master plan that is configured to use 'Forecast' as a demand type. They have a sales forecast for 100 units in January. However, they receive a firm sales order for 80 units in January. How does Master Planning handle the forecast and the sales order to avoid double-counting demand?
⚠ Common exam trap
The trap here is assuming that forecast and sales orders are simply added together, leading to double-counting of demand.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
It reduces the forecast by 80 units, leaving a forecast of 20 units, and includes the sales order for 80 units.
Master Planning uses forecast reduction to prevent double-counting when both forecast and firm sales orders exist. The sales order quantity is subtracted from the forecast, and the remaining forecast is planned. In this scenario, the 80-unit sales order reduces the 100-unit forecast to 20 units, resulting in total demand of 100 units. This method ensures accurate replenishment without over-ordering.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It ignores the forecast entirely and plans only for the sales order for 80 units.
Why it's wrong here
Master Planning does not ignore the forecast when a sales order exists. The forecast is still considered, but it is reduced by the sales order quantity to avoid double-counting. If the forecast were ignored, the company might under-plan and miss demand beyond the firm orders. The system uses forecast reduction to combine both demand sources accurately. Thus, this option is incorrect because it fails to account for the remaining forecast.
- ✗
It creates a planned order for 100 units based on the forecast and ignores the sales order.
Why it's wrong here
Master Planning does not ignore firm sales orders; they are firm demand and must be fulfilled. The forecast is reduced by the sales order quantity, not ignored. Creating a planned order solely based on the forecast would fail to prioritize the actual sales order. The system ensures both are considered, with the sales order taking precedence. Thus, this option is incorrect.
- ✗
It adds the forecast and the sales order, resulting in total demand of 180 units.
Why it's wrong here
Adding the forecast and sales order would double-count demand because the sales order is likely part of the forecast. Master Planning uses forecast reduction to subtract the sales order quantity from the forecast. This prevents over-planning. The total demand should be the greater of the forecast or the sales order, not the sum. Therefore, this option is incorrect.
- ✓
It reduces the forecast by 80 units, leaving a forecast of 20 units, and includes the sales order for 80 units.
Why this is correct
Master Planning uses forecast reduction to prevent double-counting demand. When a firm sales order exists, the system reduces the forecast by the sales order quantity, up to the forecast amount. Here, the sales order for 80 units reduces the January forecast from 100 to 20 units. The sales order is then included as demand, resulting in total demand of 100 units (80 sales order + 20 remaining forecast). This ensures that only the net unfulfilled forecast is planned.
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Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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