Adapt to get outstanding results!
At the heart of manufacturing and supply planning in Microsoft Dynamics 365 Business Central is Purchase Planning (MRP) and Production Scheduling (MPS). Used well, they provide a powerful, date driven planning engine that aligns demand, supply, and production. Used poorly, they can overwhelm planners with noise, erode trust in the system, and drive teams back to spreadsheets.
This article looks at:
- How MPS and MRP actually work in Business Central
- The common limitations planner’s encounter
- Simple, pragmatic workarounds that work in the real world
- Why reverse planning is gaining traction
- How planners must change their mindset and behaviours to succeed
---------------------------------------------------------------------------------
Get started to get results: Email one of our specialists on
---------------------------------------------------------------------------------
How MPS and MRP Work in Business Central (Quick Refresher)
In Business Central, MPS and MRP are not separate engines—they use the same planning algorithm, with different scopes of responsibility.
MPS (Master Production Schedule)
Focuses on end items (typically finished goods). It is driven by:
- Sales orders
- Demand forecasts
- Item and SKU planning parameters
The Demand Forecast is netted from real demand to avoid double-counting.
MRP (Material Requirements Planning)
Calculates dependent demand for components and raw materials based on BOMs, routings, and lead times. MRP applies only to items that are not treated as MPS items.
The output of both is the Planning Worksheet, which generates:
- New supply suggestions
- Reschedule messages
- Quantity change messages
- Cancel messages across purchase orders, production orders, assembly orders, and transfers.
The Core Strength of Business Central Planning
Business Central’s planning engine is mathematically sound and date driven. When master data is clean, it can:
- Net supply and demand accurately
- Respect lead times and safety stock
- Maintain demand to supply links via Order Tracking
- Recalculate plans quickly using regenerative or net change logic
- This makes it an excellent execution level planning engine—but not a full S&OP or advanced planning system.
Where MPS & MRP Commonly Break Down
1. Planning Noise and Planner Fatigue
One of the most reported challenges is excessive action messages—especially reschedule and cancel suggestions when dates shift slightly. In practice:
- Small changes in demand create cascading reschedules
- Overseas purchase orders already shipped still get reschedule messages
- Planners spend hours filtering signal from noise
Reality: The system is “right” mathematically—but operationally impractical.
2. Forecast Fragility
While Business Central supports demand forecasts, they:
- Must align precisely to periods
- Can be overwritten by actual demand in unexpected ways
- Require strong discipline to maintain consistently
Multi level BOM forecasting is especially sensitive, and forecast misuse often leads to either stockouts or overproduction.
3. Limited Constraint Awareness
Native MRP in Business Central:
- Does not understand finite capacity
- Assumes lead times are reliable
- Does not optimise sequencing or bottlenecks
This is by design. Business Central is not an APS system—and planners must compensate.
Simple, Proven Workarounds - That Actually Work!
---------------------------------------------------------------------------------
Insight: These are not “hacks”—they are operating patterns we see succeed repeatedly in real implementations
---------------------------------------------------------------------------------
1. Segment Items Ruthlessly
Not every item deserves full MRP treatment.
- Use MPS only for true end items
- Use reorder point / min-max for stable, high volume components
- Use Make to Order for low volume or volatile SKUs
This dramatically reduces planning noise and improves planner focus.
2. Accept That Lead Times Are Strategic, Not Literal
Lead times in Business Central are planning buffers, not promises.
Successful planners:
- Inflate lead times deliberately to stabilise plans
- Avoid daily micro adjustments
- Treat MRP as a weekly cadence, not a real time engine
3. Control When You Replan
Constant replanning creates chaos.
Best practice:
- Regenerative plan weekly
- Net change plan daily (or less)
- Lock short term horizons operationally
Reverse Planning: Why It Resonates with Planners
Reverse planning flips the question:
“Given what we can realistically buy/produce, when can we promise demand?”
Reverse planning tools for Business Central simplify traditional MRP by:
- Reducing cancel/reschedule noise
- Allowing planners to move demand dates, not just supply
- Highlighting critical shortages first
- Supporting “what is possible” planning rather than “what is theoretically ideal”
This is particularly effective when:
- Supplier lead times dominate
- Production is flexible but purchasing is not
- Customer promise dates must adapt to reality
The Real Shift: How Planners Must Change
Technology alone does not fix planning. Successful MPS/MRP adoption requires a planner mindset shift.
From:
- Firefighting shortages
- Overriding the system daily
- Treating MRP as a to do list
To:
- Managing exceptions
- Trusting patterns, not single messages
- Owning master data quality
- Aligning sales, purchasing, and production behaviours
As multiple experts note, MRP success depends as much on people and process as data.
Final Thought: MPS & MRP Are Multipliers
Microsoft Dynamics 365 Business Central MPS and MRP will amplify whatever you already are:
Good data → strong plans
Poor discipline → faster chaos
With sensible segmentation, realistic lead times, and a planner mindset focused on stability—not perfection—Business Central’s planning engine becomes a powerful operational backbone rather than a daily frustration.
Get started to get results
Email one of our specialists on
