Reorder Proposal
A reorder proposal is a recommendation generated automatically by the ERP or inventory management system, indicating which item to reorder, in what quantity and from which supplier. It is created as soon as the available stock falls below a defined threshold and must be checked and approved by the purchasing planner.
A reorder proposal is a recommendation generated automatically by the ERP or inventory management system to reorder a specific item in a specific quantity from a specific supplier. The system creates it as soon as it identifies a procurement need – typically when the available stock of an item falls below its reorder point or when an open customer order cannot be covered from the warehouse. The proposal bundles all the information needed for the order, but it does not replace the decision: it is a recommended action that the purchasing planner reviews, corrects if necessary and then converts into a binding purchase order.
The reorder proposal is therefore the central link between inventory management and purchasing. In a single step it answers the three questions of demand planning – what, how much and from whom to order – and makes the procurement process plannable and traceable. Instead of monitoring stock levels manually, the planner works through a list pre-filtered by the system and focuses on the cases where action is genuinely required.
At a glance
- Automatic replenishment recommendation from the ERP system
- Answers "what, how much and from whom to order?"
- Triggered by the reorder point or uncovered demand
- Proposal ≠ purchase order: the planner reviews and approves
- Connects inventory management, demand planning and purchasing
How a reorder proposal is created
A reorder proposal is the result of a comparison between demand and available stock. For each item, the system looks at what is known as the available-to-plan stock: the physical inventory, reduced by quantities already reserved for open orders and increased by goods already ordered but not yet received. If this available stock drops to or below the defined reorder point, or if demand from customer orders and manufacturing bills of material exceeds coverage, demand planning flags a shortfall and generates a proposal.
The proposed quantity does not necessarily result from the pure shortfall alone. The system takes parameters from the item and supplier master data into account: minimum order quantities, packaging and container sizes, fixed lot sizes and optimal order quantities. A shortfall of 40 units can thus become a proposal for 100 units if the supplier only delivers full cartons of 50 units. In this way, the reorder proposal is not just a demand notification, but already a recommendation adapted to the real conditions of procurement.
Consumption-based versus demand-based triggering
Two fundamental triggering methods are distinguished. With consumption-based planning, the proposal relies on historical values: as soon as stock reaches the reorder point calculated from average consumption and replenishment lead time, an order is placed – ideal for items with steady, predictable movement. With demand-based (plan-driven) planning, the system derives the requirement specifically from open customer orders, sales forecasts or bill-of-material explosions. This variant is suitable for sporadically requested or make-to-order items, where a rigid threshold would lead to shortages or excess stock.
Components of a reorder proposal
A complete reorder proposal contains all the information required to convert it into a purchase order. This includes the item with its number and description, the proposed order quantity, the intended supplier along with terms, the expected purchase price as well as the recommended order and delivery date. The latter is scheduled backwards from the replenishment lead time stored in the supplier master data, so that the goods arrive in time before the safety stock is reached.
The quality of this information depends directly on data quality. Incorrect reorder points, outdated lead times or missing prices in the supplier master data lead to unusable proposals – too late, too expensive or in the wrong quantity. If an item has more than one source of supply assigned to it, the system selects a preferred source based on priority, price or supplier rating, which the planner can override.
Why reorder proposals matter
The benefit of the reorder proposal lies in the automation and relief it provides to demand planning. In a product range with thousands of items, it is impossible for a person to monitor every stock level permanently. The system takes over this continuous control and reports only the items that genuinely need to be reordered. The planner works through a compact, prioritized list instead of researching requirements themselves. This saves time, reduces careless errors and makes procurement reproducible – even during holidays or staff changes.
At the same time, the reorder proposal directly affects tied-up capital. It ensures that orders are placed neither too early nor too late and neither in too large nor too small a quantity. Correctly parameterized, it maintains supply capability while simultaneously minimizing average inventory. It is therefore not merely a convenience tool, but directly impacts results: every avoided shortage prevents lost orders, every avoided over-ordering reduces warehousing and interest costs.
The reorder proposal in the ERP system
In the ERP, the reorder proposal is the handover point from inventory management to purchasing. Inventory management provides the availability, the item and supplier master data supply the parameters, and demand planning calculates and generates the proposal list. The planner reviews this list in a dedicated screen, adjusts quantities, dates or suppliers, discards lines that are not needed and converts the approved proposals into purchase orders at the click of a button. Often, several proposals for the same supplier can be combined into a consolidated order to reach minimum order values and reduce freight costs.
The reorder proposal is deliberately an intermediate step and not an automatic purchase order. This human approval is intentional: it makes it possible to factor in market information, promotions, discontinued items or supply bottlenecks that the system is not aware of. In stable, highly standardized processes, some systems also allow a fully automatic conversion of selected proposals – for example for low-value C items, where the effort of review exceeds the benefit.
The role of ABC and XYZ analysis
Not every item deserves the same attention. An ABC analysis by value and an XYZ analysis by consumption regularity help to differentiate the handling of reorder proposals. High-value, irregularly requested AZ items are reviewed manually and critically, while low-value, evenly consumed CX items can be ordered largely automatically. In this way, the review effort is aligned with the economic importance of the item rather than left to chance.
Distinction: reorder proposal, reorder point and purchase order
Reorder proposal, reorder point and purchase order are easily confused, yet they denote different things in one chain. The reorder point is a trigger – a threshold value in the item master data whose undershooting prompts a reaction. The reorder proposal is that reaction: the concretely formulated but still non-binding recommendation. The purchase order, finally, is the binding legal transaction transmitted to the supplier. Put simply: the reorder point says "act now", the reorder proposal says "this is how you could act", and the purchase order carries it out.
The decisive difference between a proposal and a purchase order is its binding nature. A reorder proposal can be changed, postponed or deleted without consequences; only upon conversion into a purchase order does an obligation towards the supplier arise. It is precisely this buffer that makes the reorder proposal a safe working tool: it automates the analysis but leaves the binding decision to the human.
Example
Example: wholesaler for electrical installation
A medium-sized wholesaler carries around 12,000 items. For a particular cable drum, the reorder point is 150 units, the average daily sales are 20 units, and the replenishment lead time of the main supplier is 5 days. The supplier only delivers in containers of 100 units. When the available stock falls to 140 units due to several orders, the ERP automatically generates a reorder proposal overnight.
In the morning, the planner sees in the proposal list: item, recommended quantity 200 units (rounded up to two full containers), main supplier, purchase price and delivery date in five days. From a conversation with a customer, they know that a large order is coming up next week, increases the quantity to 300 units and combines the proposal with two further line items from the same supplier into a consolidated order to reach the minimum order value. One click converts the reviewed proposals into a binding purchase order – without the planner having had to research a single stock level manually.
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