Sequence of operations

Sequence of operations

• Description
• Breakdown of production costs
• Set-up time / piece time / throughput time
• Functionality
• Related topics
• Technical documentation

Description

A work plan consists of individual work sequences or operations. This module is used to record individual work sequences, i.e. work sequences that are only to be carried out at the workstation/resource specified in this work sequence. Only the set-up time and the piece time can be entered as a formula - and therefore variable.

If a sequence of operations is to be defined variably with regard to the workstation/resource, a conditional sequence of operations can be inserted into the work plan.

Distribution or calculation of production costs

In principle, the production costs for a part are divided into two differently valued parts:
Labour costs and material costs

As a standard, the additional costs incurred in addition to wages and materials, e.g. for purchasing or stock management of the required parts, are included in the overheads. These are stored globally in the client.

However, the following approach is preferable in order to be able to calculate production costs precisely according to other costs incurred during production, such as machine running costs and programming costs, without having to include all costs invisibly in overheads:

In the part or at the work plan position, a material characteristic must be defined which contains the costs for e.g. the machine costs per hour according to the following format
costs = 120€/h (see below in the picture in the work sequence)

You must therefore create a material characteristic for each cost element.
The characteristic can also be stored directly on variant parts and calculate itself from other constraints (calculated or conditional characteristics).

To be able to take these costs into account, a formula in the resource of the work sequence is necessary (in the picture the standard costs of the working group):
Standard costs = formula = costs+(40€/1h)
Since the formulae do not know any compound units, instead of 40€/h --> write 40€/1h and put this in brackets.

The machine costs per hour specified via the material characteristic are now added to the standard machine costs per hour.

In order to check whether the costs are actually there without any error occurring, the formula can be extended by a query as follows

(if(has(costs))costs else (0?))+(40€/1h)

In this case, the system queries in advance whether the costs have been found and otherwise uses the value 0?, whose unit is based on the next component for further calculation.

In the parts precalculation we then immediately see the result:

The marked line is our work sequence, which has received wage costs of 1.600€ for 600 minutes (10 hours) (120€ machine running costs + 40€ standard costs = 160€ per hour * 10 hours = 1600€)

Set-up time / piece time / throughput time

The times can be given as a value, formula or conditional table in the parts list.

• Value is an absolute time value, e.g. "5 min".
• Formula - Times can be calculated with a calculation formula. For example, you can access the quantity of the exploded BOM item with "transaction.Amount()". The following example calculates a setup time of 30 min. per 250 litres of the exploded item.
  
• Conditional table - This can be used to define times that cannot be represented in any continuous function (formula), e.g.:

  Condition	Formula
  transaction.Amount()>50Pieces	1min
  transaction.Amount()>25pcs	3min
  	10min

Examples of values that can be used in a formula or condition in the sequence of operations:

Functionality

• Input window

This window is used to maintain individual work sequences or operations. You can select a sequence directly by entering the desired sequence number in the sequence field and confirming with RETURN.

To show that this sequence of operations is an external production you have to select a supplier under resources. In addition, a unit of performance that represents this external performance and must be defined at the supplier. In this case of external production there are several rules to be observed, so that e.g. the deregistration of the PDC hours but also the preliminary costing of parts runs smoothly:

A further description of external production within the work plans can be found here.

The second tab "Document directory references" allows you to link the position to document directories. A document could thus serve as a quality assurance instruction, for example.

Input window

Toolbar

Symbol	Description
	Create new work sequence
	Save changes
	Delete work sequence
	Print work sequence
	Set validity
	Create/edit notes
	Call up the input window for the work plan of the current work sequence

Fields

Field	Description
Position data
: Sequence of work	Number of the work sequence. The formatting can be specified by the CX_JOB_SCHEDULE_ITEM counter. It is also possible to set a counter with this counter. By default there is no counter and the formatting is preset with "000" "000".
: from index	Index of the work sequence
: Operation	This group is displayed when editing work plans, the following group "Production area" is then hidden
: : Operation	Operation Description
: : Order roll	Assignment to an ordered article, if the work sequence is external production (extended workbench)
: : Place	Assignment to workstation
: : Resource	If a workstation has been selected to which resources such as machines, work groups or suppliers have been assigned, they can be selected in this field
: Production area	This group is displayed when editing resource plans, the previous group "Operation" is then hidden
: : Area	Assignment to a production area
: : Process	Explanatory text, which process has to be carried out in the production area
: : Resource	If a workstation has been selected to which resources such as machines, work groups or suppliers have been assigned, they can be selected in this field
: : Date control	Here you can specify whether the resource should be given special attention in its further use (e.g. printed on "appointment cards" or similar)
: Times	-
: : Setup time	Set-up time to complete the sequence of operations. See
: : piece time	Unit or individual time per yield. See
: : Variable names of the time	In this field the total time of the work sequence can be assigned a variable name in order to be able to use this total time in further calculations
: : : Omitted for zero piece time	Identification whether the work sequence should be ignored if the piece time is zero: e.g. if the piece time is calculated using a formula
: : Lead time	Direct entry of the throughput time of this sequence of operations or marking that the throughput time of the workstation generally applies. See
: Features	-
: : List of characteristics	List of characteristics to describe the operation (e.g. technical) more precisely
Texts
: Free text	Freely definable, multilingual text
: Text modules
: : Create	Creating a local text module
: : Insert	Inserting a global text module or a global condition group
: : Remove	Remove the text module selected in the list of text modules
Documents (For an additional description of the assignment of documents, click here)
: Structure tree	Using the structure tree on the left side, subfolders or subnodes( ) can be created. Associations (document references, parts, subroles, partner roles, etc.) can be moved within the structure via drag & drop and thus structured. In addition, it is possible to navigate via the structure tree to display the associations of the folder in the right-hand list. (At present only document references can be structured).
: List	On the right-hand side is the list of document references. The local document references are marked with the little house symbol ( ) and the global ones with the document reference icon ( ) is displayed. In addition, global document references can also be inserted as a conditional table. Of the associated documents, the description of the document reference is displayed next to the type. This can be either the short title in the operating language or the description text. In addition, the type and the file name are displayed. link: Description of the buttons for maintaining the assignments to the document references
Description of structure node	For the folder (structure nodes) defined in the structure tree, a different description can be entered here and saved using the save button to the right of the field.

Related topics

• Index
• Work plan
• Conditional order of work
• Parts list
• Conditional parts list item
• Extended workbench

Technical Documentation

• Overview
• Implementation
• Quality assurance
• Single allocation base module
  • Work sequence editing module

Overview

Individual allocation of basic module

Module name

allocsng.mod

Classes

CX_SINGLE_ALLOCATION

Security

In addition to restricting access rights via the class and its data fields, the module can be restricted in its use via some of the received messages.

Work sequence editing module

Module name

jobssing.mod

Classes

CX_SINGLE_ALLOCATION

Security

In addition to restricting access rights via the class and its data fields, the module can be restricted in its use via some of the received messages.