DIFOT (Delivered In-Full, On-Time) or OTIF (On-Time In-Full) is a measurement of logistics or delivery performance within a supply chain. Usually expressed as a percentage, it measures whether the supply chain was able to deliver:
- the expected product (reference and quality)
- in the quantity ordered by the customer
- at the place agreed by the customer
- at the time expected by the customer (in most of the cases, with a tolerance defined with the customer).
It measures how often the customer gets what they want at the time they want it. Some consider it superior to other delivery performance indicators, such as shipped-on-time (SOT) and on-time performance (OTP), because it looks at deliveries from the point of view of the customer.
This Key Performance Indicator (KPI) has the advantage of measuring the performance of the whole logistic organization in meeting customer service expectations. To reach a high OTIF level, all the functions of the supply chain (among which orders taking, procurement, suppliers, warehouses, transport...) must work at their best level.
Generally OTIF is calculated by taking into account the number of deliveries:
OTIF ( % ) = number of deliveries OTIF ÷ total number of deliveries * 100
But it can also, according to organizations, be calculated according to the number of orders or the number of the order lines.
Requirements for the OTIF measurement are :
- have a delivery date (even hour for some organizations) on the customer order
- measure the date or the hour of delivery and archive it in the system
- maintain record of the reasons why an order was not OTIF.
If the orders are split at the customer request, then each delivery line is considered.
Companies which have set up a measure of the OTIF are unanimous to recognize its value . They quote among other positive aspects : the increase of the operating profit due to the reduction of operating expenses (in relation with the non-quality reduction, better inventory control, better customer orders taking, higher reliability in storage and transport...) and the increase of sales (due to a better product availability for sales).
Typically, leading practice in the [UK] retail sector would demand an OTIF in excess of 97 per cent measured at a stock keeping unit (SKU) level.
The OTIF notion was extended to DIFOTAI (Delivery In Full On Time Accurately Invoiced) which also takes into account the quality of the invoicing.