Execution Logic Structure Template

Introduction

An execution logic structure (ELS) template is used to create execution logic structures (ELSs) and execution logic orders (ELOs).

The grouping criteria must be defined for the valid combination of product model and grouping ID. Once the grouping criteria is defined, it must be completed in order to retrieve basic data based on the criteria. The basic data is used to define the grouping nodes of the ELS template. This functionality is further described in the following chapters.

Execution Logic Grouping Criteria

It is possible to define which attributes on a task card and subtask should be used to define the ELS. This is done by using the predefined grouping criteria available on the ELS template. The grouping criteria is made up of the following grouping elements that can be grouped, sequenced, and ordered according to your requirements.

• Execution phase ID
• Function number
• Resource ID
• Task card location
• Zone ID

The grouping criteria is defined per product model and grouping ID. The main purpose of the grouping ID is to provide flexibility on the number of grouping criteria that can be defined per product model, for instance, when you need to handle different types of maintenance visits.

To limit the amount of basic data that will be included when generating an ELS template, you can define which basic data should or should not be included when generating. This is done by selecting or clearing the Include in Execution Logic Planning check box for the relevant basic data records corresponding to the grouping elements.

Following is an example of grouping criteria and how it works:

Product Number	Model Number	Grouping ID	Grouping Description	Status
Fighter	F-16	MAJ	Major Check	Active
Grouping Element		Group By	Sequence By	Level in Structure
Execution Phase ID			1	1
Function Number
Resource
Task Card Location
Zone ID			2	2

Using the data in this example we see that the grouping criteria is first grouped by Execution Phase and then by Zone. Level in Structure is used to set the number of levels on which grouping nodes are to be created. Here we see that grouping nodes will be created on two levels of the structure. Observe the graphical illustration below. The first grouping node is created for each execution phase that has the Include in Execution Logic Planning check box selected (e.g., REC/IND). The second grouping node is for the combination of valid execution phase and zone (e.g., REC/IND-100). The actual ELS node is located on the third level of the structure. When a structure level is not entered the structure will be created with just one level.

The grouping ID is status dependent. The following table shows the valid statuses for a grouping ID:

The following table shows the different menu options available for the grouping ID:

Execution Logic Structure Template

The ELS template is generated automatically when you perform the Complete Grouping Criteria function.

Once grouping criteria is defined and the Complete Grouping Criteria function executed, data defined in the basic data for the grouping elements which are selected to support sequencing will be retrieved. When this is done, the grouping elements will be concatenated based on the priority set by the given sequence. The generated ELS template can be viewed in the gantt or in a table format. Note: Since predecessor information cannot be set automatically, you will need to manually define predecessor information either in the gantt or in the table. You can also easily define predecessors and successors for a grouping node by using the Define Predecessors and Successors function.

Continuing with the example given above, assume that the following values have been defined in the basic data for Execution Phase and Zone:

Based on the example data, the ELS template will be generated as follows. Note that an example of predecessor information that can be entered is shown in the Predecessor column in this table.

Through the ELS template you can set up an execution logic sequence to be the generic sequence for performing work during a maintenance visit. Once the visit has an ELS associated, all task cards and subtasks assigned to the various event codes of the maintenance visit will be assigned automatically to the relevant ELS grouping nodes within the structure.

ELS Template Gantt

Often large amounts of data will be generated in the ELS template and it can be complicated to work with a table view. In such instance, the gantt can be used to obtain a graphical view of the ELS template and to easily draw the dependencies (sequencing) between the different nodes. The gantt is made up of the navigator which can be used to view the nodes in the structure textually and the chart which can be used to get a graphical view the grouping nodes.

In the chart, grouping nodes are denoted by a graph bar with inverted triangles at each end while ELS nodes are denoted by a blue bar.

To create links (predecessors and successors) between the different nodes, you need to have the Create Dependencies Mode activated in the gantt. In this mode you can draw dependencies between different nodes in the structure. Note that any changes in the gantt will be reflected automatically in the table and vice versa.