Picture a small textile workshop. The warehouse is packed with fabric, yet when a customer order arrives, the exact weight and color needed is nowhere to be found. Production stops, the customer waits, and the owner is furious. Meanwhile, all that fabric sitting on the shelves is money that cannot be spent elsewhere — paying rent, absorbing humidity, and slowly losing value. This is a familiar trap for many small and medium-sized businesses. MRP, which stands for Material Requirements Planning, is a software system built specifically to break out of that trap.
An MRP program looks at the production schedule and calculates which materials are needed, in what quantities, and by what date. The logic works like this: first the system reads what needs to be produced, then it checks what parts and raw materials each product requires, then it compares that against current warehouse stock, and finally it signals what must be ordered and when. Doing this calculation on paper is possible for a handful of products. With hundreds of stock items and dozens of suppliers, however, manual tracking becomes both exhausting and error-prone. The program runs the same calculation in minutes.
The cost of holding too much stock is easy to underestimate. Every box or bag sitting unused in the warehouse is money frozen in place. Consider a manufacturing firm that keeps 50,000 lira worth of raw materials idle for three months. That sum is not earning anything — it is losing the interest it could have generated in a bank account. Add the share of warehouse rent attributable to that stock, insurance costs, and the risk of spoilage or damage, and the real cost of excess inventory becomes clear. An MRP system schedules purchase orders to arrive just before production begins, not weeks earlier. The warehouse stays manageable and capital stays free.
The cost of a material shortage is more visible and more painful. When production stops, workers stand idle but wages still run. A promised delivery date is missed, and the customer complaint — or worse, the cancelled order — follows. Placing an emergency order with a supplier almost always means paying a higher price and rushing the shipment. Add it all up and a single material shortage can cost far more than the material itself. An MRP program takes supplier lead times as an input and counts backwards from the required production date to determine exactly when each purchase order must be placed. The last-minute scramble disappears.
A simple example makes this concrete. A furniture workshop produces 200 sofas per month. Each sofa needs four metres of fabric. The fabric supplier takes ten days to deliver. The MRP system takes these figures, checks the production calendar, and tells the purchasing clerk the exact date to place the fabric order. In the past, the owner estimated this from memory or the bookkeeper flipped through a ledger. Mistakes were common. With the program handling the calculation, the workshop avoids both ‘we have nothing left’ and ‘the warehouse is full but not with what we need.’
Setting up one of these programs is not simple. Every product structure — meaning which parts and materials go into each finished product — must be entered into the system accurately before it can produce useful results. Supplier lead times, minimum order quantities, and typical waste rates all need to be defined correctly. If the input data is wrong, the output will be wrong too. In practice, the first few months after installation usually involve correcting data entry mistakes and adjusting settings. Local resellers and authorised dealers who sell these systems generally provide installation support and basic training. Once the system is properly set up, the time spent manually tracking stock drops noticeably.
For an SME owner, the real question is whether the investment makes sense. The honest answer depends on the complexity of the operation. A small workshop making a single product from a handful of materials can probably manage with a notebook and some discipline. But once the product range grows beyond fifty items, suppliers multiply, and order volumes fluctuate, an MRP program starts paying for itself. Before making a decision, add up what material shortages actually cost last year: production downtime, emergency orders, late delivery penalties, and lost customers. Then compare that figure to the cost of the software and the time needed to set it up. If the first number is larger, the decision is straightforward.
This article was originally written in Turkish by Gökhan MERCANOĞLU on July 10, 2000 and has been automatically translated into English and other languages using machine translation.