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Added by Noel Connolly, last edited by Noel Connolly on Dec 30,
2013
Supply Chain Management (SCM) / / Shipping and transport
scheduling
Route Scheduling - Technical Information
Purpose
The purpose of this page is to give a technical overview in
relation to how route scheduling is performed in the ECC system. It
is intended as a debugging aide for any route scheduling
problems.
Overview
The route scheduling functionality allows you to plan accurate
outbound deliveries to the ship-to parties on a route.
Route Schedule Tables
The bulk of the data related to route schedules is contained in
the following 3 tables:
1. VALW - Delivery Plan: Definition of Route Schedule
2. VARK - Delivery Plan: Customer-Specific Itinerary
3. VAWK - Delivery Plan: Itinerary Determination,
Customer-Specific
When a route schedule is created, one entry will be created in
table VALW for this route schedule. During the save of the route
schedule, SAPLV51B, FORM AULWE_INSERT (Include LV51BF0A)
passes the route schedule values to the internal structure
XVALW_UPD. These values are later passed to the function
SD_DELIVERY_SAVE_VALW.
The number of entries in table VAWK depends on the number of
ship-to parties maintained in the route schedule; for example, if
there are 5 ship-to parties maintained in the route schedule, there
will be 5
entries for the route schedule in table VAWK. Function
SD_DELIVERY_SAVE_VAWK is called during the save of the route
schedule to create the VAWK entries.
If an itinerary is maintained for the route schedule, the data
for this itinerary is stored in table VARK. Table VARK contains an
entry for each individual line of the itinerary. For example, if
the itinerary of the
route schedule contains 5 lines, there are 5 corresponding
entries stored in database table VARK. Function
SD_DELIVERY_SAVE_VARK is called during the save of the route
schedule to create the
VARK entries.
Route Schedule Determination Function Modules
There are 3 principle function modules involved in the route
schedule process:
1. SD_ROUTE_SCHEDULE_DETERMINE
2. SD_ROUTE_SCHEDULE_READ_DB
3. SD_ROUTE_SCHEDULE_PREPARE
1. Function SD_ROUTE_SCHEDULE_DETERMINE is called by the SD
scheduling to determine a route schedule. SD passes over the
relevant information for the sys tem to determine a route
schedule.
This includes the shipping point, shipping conditions, route,
transport group, ship-to party, Goods issue date/time &
delivery date / t ime.
2. Function SD_ROUTE_SCHEDULE_READ_DB is called by function
SD_ROUTE_SCHEDULE_DETERMINE. Function SD_ROUTE_SCHEDULE_DETERMINE
selects all the entries from database
ables VALW, VARK & VAWK into the respective internal tables.
Please note that the system does not impose restrictions on the
selects in function SD_ROUTE_SCHEDULE_DETERMINE; for table
VARK, this is addressed in SAP note 1235113.
After function SD_ROUTE_SCHEDULE_READ_DB is executed, function
SD_ROUTE_SCHEDULE_DETERMINE sorts the internal table lt_vawk. This
sorting is important as function
SD_ROUTE_SCHEDULE_PREPARE will loop through this internal table
in this order as it decides which route schedules are valid. For
example, it ensures exception route schedules will be evaluated
before general route schedules in function
SD_ROUTE_SCHEDULE_PREPARE.
3. Function SD_ROUTE_SCHEDULE_PREPARE checks each of the
determined route schedules and adds any valid route schedules to
the internal table ET_RSCHED. The valid route schedules in
ET_RSCHED are returned to function SD_ROUTE_SCHEDULE_DETERMINE.
Function SD_ROUTE_SCHEDULE_DETERMINE will select the most
appropriate route schedule by comparing delivery
date of route schedule with the SD delivery schedule.
This is a typical call stack of the route scheduling:
SAPLV03C FUNCTION SD_ROUTE_SCHEDULE_PREPARE
SAPLV03C FUNCTION SD_ROUTE_SCHEDULE_DETERMINE
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