MB-330 Implement Master Planning Practice Question
You are configuring safety margins in Dynamics 365 Supply Chain Management to protect against demand variability. Which TWO settings can be used to add a buffer to planned orders? (Choose two.)
⚠ Common exam trap
Many exam-takers confuse reorder point or lead time with safety margins; those affect replenishment but do not provide the protective buffers that safety stock and safety margins do.
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
✓
Safety margins
Safety stock adds a quantity buffer by increasing net requirements, while safety margins add a time buffer by advancing order dates. Both settings are used in Master Planning to protect against demand and lead time variability. They are configured on the item's coverage group or default order settings and directly influence planned order generation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Safety margins
Why this is correct
Safety margins add a time buffer by advancing the requirement date of planned orders. This ensures that orders are placed earlier than needed, providing protection against lead time variability. It effectively adds a buffer to the timing of planned orders, reducing the risk of stockouts.
- ✓
Safety stock
Why this is correct
Safety stock is a quantity buffer maintained to absorb demand fluctuations. Master Planning considers safety stock as additional demand, ensuring that planned orders replenish inventory up to the safety stock level. This directly adds a buffer to planned orders, protecting against variability.
- ✗
Reorder point
Why it's wrong here
Reorder point is a fixed quantity threshold that triggers replenishment when inventory falls below it. While it acts as a buffer, it is not a safety margin setting in Master Planning; it is part of Min/Max coverage. It does not dynamically adjust planned orders based on variability, and it is not considered a safety margin configuration.
- ✗
Maximum inventory
Why it's wrong here
Maximum inventory is used in Min/Max coverage to define the upper limit for replenishment. It does not add a safety buffer; it simply caps the order quantity. It does not protect against variability in demand or lead time, and it is not a safety margin setting.
- ✗
Lead time
Why it's wrong here
Lead time is the time required to replenish an item. It affects the timing of planned orders but does not add a buffer quantity or time margin. It is a fundamental parameter for scheduling, but it does not provide protection against demand variability beyond its inherent offset.
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Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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