Delivery Capability
Delivery capability is a company’s ability to fulfil a customer order completely and on the requested date, either from available stock or through timely procurement. It measures how reliably promised quantities and dates are actually met.
Delivery capability describes a company’s ability to fulfil an incoming order in the requested quantity and by the promised date – either directly from available stock or in time through procurement. An item is considered deliverable when enough available stock exists at the moment of the enquiry, or when replenishment is secured well enough to keep the promised delivery date. Delivery capability is therefore not mere stock on hand, but the result of stock, procurement and materials planning working together.
For retail, e-commerce and manufacturing companies, delivery capability is a central performance measure: it decides whether a customer can order and be supplied quickly, or whether they switch to a competitor. It is measured through metrics such as the service level or the availability ratio, which express the share of demand that can be served immediately. High delivery capability increases revenue and customer satisfaction, but incurs costs through the inventory needed for it – the goal is therefore an economically justifiable level, not maximisation at any price.
At a glance
- The ability to serve orders on time and in full
- Result of stock, procurement and planning – not just stock on hand
- Measured via service level or availability ratio in percent
- Trade-off: high delivery capability ties up capital in inventory
- Visible in the ERP as available stock (ATP) in real time
What delivery capability is made of
Delivery capability does not arise from high stock levels alone, but from the interplay of several factors. The decisive one is available stock: not the goods physically sitting in the warehouse, but the freely plannable stock after deducting quantities already reserved or in picking. Added to this are the replenishment lead time of the items, the reliability of suppliers and the quality of inventory management. If the book stock recorded in the system does not match reality, delivery capability is either faked or wasted – for instance when something is sold that is no longer there.
A distinction is made between delivery capability from stock – the customer receives goods immediately from inventory – and delivery capability through procurement, where no stock is on hand but the promised date is kept through timely reordering or drop shipping. For standard items in e-commerce, immediate availability matters most; in project or B2B business, a reliable date commitment often suffices. Both forms rely on clean inventory planning through safety stock, reorder point and purchase proposals.
Available stock instead of physical stock
The key concept of delivery capability is available stock, often referred to in the ERP as “ATP” (Available to Promise). It results from physical stock plus firmly scheduled receipts (open purchase orders with a date) minus all reservations for already recorded customer orders. Only this figure tells you whether a new order can truly be served. A warehouse can look full and still not be deliverable if all its stock is already allocated to other orders.
How delivery capability is measured
Delivery capability is quantified through service levels. The alpha service level (event-oriented) measures the share of orders or order lines that could be served in full from stock. The beta service level (quantity-oriented) measures the share of demanded quantity that was delivered immediately. A beta service level of 98 percent means that 98 of every 100 units demanded were delivered without delay. Such metrics make delivery capability comparable and controllable, for example as a target value per item group.
In practice the metric is differentiated by item. For high-revenue A items or bestsellers, a high service level is targeted because shortfalls here cost revenue directly; for rare C items, a deliberately lower level is accepted to save tied-up capital. This prioritisation draws on analyses such as the ABC analysis and the XYZ analysis, which classify items by value and demand regularity and thus determine where high delivery capability is economically worthwhile.
Why delivery capability is economically decisive
Delivery capability is directly linked to revenue and customer loyalty. If an ordered item cannot be delivered, a shortfall arises: the customer waits, cancels or buys from a competitor – often with a single click in e-commerce. Besides the lost contribution margin, B2B business risks contractual penalties and a long-term loss of trust. Reliable delivery capability is therefore a competitive advantage that translates directly into repeat-purchase rates and customer satisfaction.
At the same time, delivery capability is not free. High availability requires high safety stocks that tie up capital, occupy warehouse space and carry a write-off risk. There is a classic conflict of objectives between delivery capability and inventory costs: the last percentage points of service level are disproportionately expensive because they must also cover rare demand peaks. An optimised rather than a maximised level is therefore economically sensible – aligned with margin, customer expectation and the replenishment lead time of the respective item.
Distinction: delivery capability, availability and delivery reliability
The terms are often blurred but mean different things. Availability describes the basic ability to deliver from stock at short notice and is mostly used synonymously with delivery capability. Delivery reliability (or on-time performance), by contrast, measures whether promised dates are actually met – a company can be capable of delivering and still be unpunctual. The delivery service level combines both aspects. In practice: delivery capability concerns the “whether and how much”, delivery reliability the “when”.
Delivery capability in the ERP system
In the ERP and inventory management system, delivery capability becomes visible through the availability check. During order entry, the system shows available stock in real time, reserves the ordered quantity and reports whether and when delivery is possible. The basis is correct inventory management that posts every receipt and issue immediately, so that sold goods are not promised twice. In multichannel environments with several shops and marketplaces, this central, cross-channel stock view is the prerequisite for delivery capability not being undermined by overselling.
Beyond mere display, the ERP actively safeguards delivery capability. When an item’s stock falls below the reorder point, materials planning automatically generates a purchase proposal so that replenishment happens in time. Safety stocks buffer fluctuations, and consumption-based planning adjusts the thresholds to actual demand. In this way the system links inventory management, purchasing and sales into a control loop that keeps delivery capability at the planned level – without planners having to monitor every item manually.
DACH specifics and commitments
In German-speaking countries, availability statements are legally relevant. Claims such as “in stock” or “in 2–3 days” in an online shop must be truthful; misleading delivery-time statements can be warned off under competition law. B2B framework contracts also frequently contain guaranteed service levels or liquidated damages in the event of delivery failure. A correctly maintained, near-real-time availability in the ERP is thus the basis for dependable delivery commitments not only in business terms but also legally.
Example
Example: multichannel retailer of outdoor equipment
A mid-sized retailer sells outdoor equipment through its own online shop, two marketplaces and in-store sales. For a popular hiking boot, 400 pairs are physically in the warehouse. But because 260 pairs are already reserved for open orders, the available stock is only 140 pairs. Exactly this figure is mirrored to all sales channels so that no more is promised than can actually be delivered.
When an autumn campaign causes demand to spike, available stock falls below the stored reorder point within a few days. The ERP automatically generates a purchase proposal with the main supplier, whose replenishment lead time is five days. Because a safety stock was planned in, the boot remains deliverable throughout the campaign – the service level for this A item ends the quarter at 99 percent, while less requested C items are deliberately managed with lower stock and lower availability.
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