Most manufacturers have the same inventory problem: too much of some parts and not enough of others. Cash is tied up on the shelf while the production line waits for one missing component. Inventory optimization is the work of fixing that imbalance with better rules, not just more spreadsheets. This article explains what that work involves for a small or mid-size business.
Why inventory gets out of balance
Inventory rarely goes wrong because of one big mistake. It drifts. Reorder points were set years ago and never updated. Lead times changed, but the system still uses the old ones. A product was discontinued, but its components are still ordered. A buyer adds a little extra “just in case” after each shortage. Each decision makes sense on its own, but together they leave the warehouse full of the wrong things.
The four parts of the work
1. Classification
Not every item deserves the same attention. ABC classification ranks items by their annual value, and XYZ classification ranks them by how stable their demand is. Together they show where tight control pays off and where simple rules are enough. We explain the method in ABC/XYZ classification for small manufacturers.
2. Safety stock
Safety stock is the buffer that protects you against variation in demand and lead time. Set it too low and you run out; set it too high and you tie up cash. The right level depends on how variable each item is and how much service you need. See our safety stock formula guide and the free safety stock calculator.
3. Reorder points and order quantities
The reorder point tells you when to order, and the order quantity tells you how much. These should reflect current lead times, real usage and supplier minimums. Our guides to the reorder point formula and EOQ vs MOQ cover the basics.
4. Slow-moving and dead stock
Some inventory will not sell or be used at its current rate for years. Finding it, deciding what to do with it and stopping new purchases of it can free up space and cash. Read how to find and clear dead stock and see our dead stock and working capital service.
What data the work needs
You do not need perfect data. A typical starting point is:
- An item master with descriptions, units and costs
- Usage or sales history, ideally twelve months or more
- On-hand quantities and open purchase orders
- Supplier lead times and minimum order quantities
Gaps are normal. Part of the work is finding them and deciding on sensible assumptions, then flagging those assumptions so your team can improve them over time.
What you receive
The output should be practical. Typical deliverables include:
- A classified item list showing which items need tight control
- New safety stock and reorder point values, ready to load into your ERP or spreadsheet
- A list of slow-moving and dead stock with suggested actions
- Written rules explaining how the numbers were set and when to review them
- A short handover so your planners can update the values themselves
Why start with a focused scope
It is tempting to fix every item at once. In practice, it is usually better to start with one product family, one plant or the highest-value items. A focused scope produces results you can check quickly, and it builds trust in the method before you apply it more widely.
At Statadventure, focused engagements typically run two to five weeks once scope and core inputs are confirmed. We start with a free call, and we agree the scope with you before we start. We do not guarantee savings; results depend on your data, decisions and follow-through.
Related reading
- What does a supply chain consultant actually do?
- A right-sized S&OP process for small manufacturers
- Free supply chain calculators
- How to hire a supply chain consultant
Frequently asked questions
How often should safety stock and reorder points be updated?
It depends on how quickly your demand and lead times change. Many businesses review A items monthly or quarterly and other items twice a year. The key is to have a routine rather than waiting for a problem.
Can we do inventory optimization ourselves?
Yes, especially for a small item list. Our free calculators and guides are a good start. Outside help is most useful when the item list is large, the data needs cleaning or the team does not have time to do the analysis.
Will optimizing inventory reduce our stock levels?
Not always. Some items will need less stock and others more. The goal is the right stock for the service you need, not simply less stock. We do not promise reductions before seeing your data.
What if our ERP cannot store the new values?
Most ERP systems can, but if yours cannot, we can provide a simple tool your planners use alongside it.