Delivery reliability
Delivery reliability is one of the five attributes in
Following the nomenclature of the DR-DP-Matrix, three main approaches to measure DR can be distinguished:
- (=CLIP)
- Type of measurement: volume (V)/singular(S)
- Type of view: on time (T)/ delivery (D)
Volume/on time (=CLIP)
Formula
If ()
- =
Note: In the case that supplier notifies the appropriate partner in the supply chain that a promised delivery date/quantity cannot be met which is called delivery early warning (DEW), the sum of DEW issued to reduce the commit for a certain week is added in the denominator.
Else
- NULL
Demand: Suppliers confirmed quantity; c: Product identifier; p: Time period e.g. a day, a week, a month ...
The cumulation over a period and a group of product identifiers c is done as follows:
whereas p is determined by demand period
Singular/delivery and singular/on Time
Singular case definition
To fit to the needs of the environment, the granularity of a singular case () has to be defined. In general a singular case is described by an n-Tuple consisting of a set of the following order and delivery details:
- order number
- customer identifier
- product identifier
- wish date of customer
- confirmed date of supplier
- ship to information
- delivery date
- delivery note number
Formula
1)
- After a singular case has been delivered to the customer its DR is measured as follows:
- If (wish date <= arrival date <= confirmed date of supplier) then
- DRsingular case=1
- else
- DRsingular case=0
- If (wish date <= arrival date <= confirmed date of supplier) then
arrival date = delivery date + transit time
By cumulating the results of singular cases over a certain period p and, if necessary, additional criteria c (e.g. customer, product, ...) the delivery reliability is calculated as follows:
whereas p is determined by the arrival date
2)
- After a period has elapsed all singular cases with first confirmed date within period are considered and their DR is measured as follows:
- If (wish date <= arrival date <= confirmed date of supplier) then
- DRsingular case=1
- else
- DRsingular case=0
- If (wish date <= arrival date <= confirmed date of supplier) then
arrival date = delivery date + transit time
By cumulating the results of singular cases over a certain period p and, if necessary, additional criteria c (e.g. customer, product, ...) the delivery reliability is calculated as follows:
whereas p is determined by the first confirmed date
Result
0%≤≤100%