Workflow Panels

This section describes various tasks related to application workflow panels.


Workflow panels are available in software versions from AIMMS 4.68 onwards.

Starting from AIMMS 4.68, it is possible to design and configure Workflows in the AIMMS WebUI. The Workflow Panel is used to represent and run any workflow which is designed and defined by the application developer in the model. AIMMS allows the application developer to configure multiple workflows in an application.

A Workflow Panel is a progression of steps (tasks, events, interactions) that comprise a work/business process and create or add value to the organization’s activities.

The Workflow Panel guides the user through the defined set of steps in a specific workflow. It also gives the user the flexibility to enter or leave a workflow at any step of the process. The user can also navigate between workflows, so there is no restriction to only one workflow at a time.

The workflow has states for each step that indicate to a user which steps can or cannot be accessed. Data states help indicate which steps are complete, incomplete or in an error state, as illustrated below.


The Workflow Panel can also be collapsed and expanded:


In the collapsed view, when the user hovers over a step the tooltip helps with identifying the purpose of that step:


Configuring the Workflow Panel

The Workflow Panel can be configured by the application developer via the AIMMS model. Public Workflow Support Declarations have been defined in the inside the Pages and Dialog Support section of the AIMMS WebUI system library. These pre-declared identifiers are used to configure different workflows and their respective steps.

To create and configure the Workflow Panel in the application you will need to create two string parameters. The first string parameter will configure the number of workflows in the application, while the second string parameter will configure the steps of each workflow.


When creating the string parameters to configure workflows and their steps, the first index for configuring Workflows, the first and second index for configuring Workflow Steps needs to be in a subset of integers. You can create your subset of integers and use the respective index as well. To make it convenient you can use the indices from the pre-declared set ExtensionOrder for this purpose i.e. indexWorkflowOrder and indexNoOfPages.

Configuring Workflows

For illustration, let’s call the first sting parameter MyWorkflows(webui::indexWorkflowOrder,webui::indexWorkflowSpec). This string parameter is indexed by the ExtensionOrder set with the index indexWorkflowOrder and the WorkflowSpecification set with the index indexWorkflowSpec. This string parameter is used to define the number of workflows and their respective titles. The values of this string parameter may be initialized in the Initial Data attribute, in a procedure or manually, by right clicking the string parameter and clicking on the Data option in order to open its data page. There you can add the details for the Workflow and their titles (leave the style property empty for now):


The values in the example above indicate that there are 3 workflows in the application at hand.

Configuring Steps of Workflows

Create the second string parameter, let’s call it MyWorkflowSteps(webui::indexWorkflowOrder,webui::indexNoOfPages,webui::indexWorkflowPageSpec) indexed over both indices of the ExtensionOrder set and over the index of the WorkflowPageSpecification set. This string parameter is used to define the steps for each workflow which has been defined in the MyWorkflows string parameter. In particular, each pageId which is configured becomes a step displayed in the Workflow Panel, see further below.


The indices must follow the same order as described in the string parameter MyWorkflowSteps(webui::indexWorkflowOrder,webui::indexNoOfPages,webui::indexWorkflowPageSpec)

Most of the times, configuring a page only in one workflow could suffice for the application at hand. However, the Workflow functionality is flexible enough such that one page may be configured in multiple workflows, if necessary. Although the page will be shown as a step in each of those workflow, there will be one workflow with the highest rank (ie, the smallest order number) referencing the page and this workflow will be the one shown on the page when the page is opened. So, whenever you click on that step (in any workflow) you will be taken to the corresponding step in the first workflow where the pageId is referenced. Here “first workflow” is meant in the order of the workflows as defined by the MyWorkflows string parameter.

For example, if a page ‘Results’ with pageId = results_1 is configured for two workflows “Route Optimization” and “Inventory Management”, then the page Results will appear in both workflows, but will redirect the user to step in Route Optimization workflow when accessed, as illustrated below.

The page Results is configured for two workflows:


The page Results is shown as a step in both workflows:


In this case, when the user is on the Inventory Management workflow and clicks on the Results step, the user will be redirected to the Results step in the Route Optimization workflow, because Route Optimization is the first workflow (referencing the page Results) in the order of the workflows as defined by the MyWorkflows string parameter.

There is no limit for the number of steps each workflow may have. As a guideline, AIMMS recommends no more than 10 steps per workflow. If more than 10 steps are required, then please try to breakdown the workflow into smaller workflows, if possible.

In order to inspect the values, right click on the MyWorkflowSteps string parameter and click on the Data option in order to open its Data page:


The data entered in the above illustration is for the 1st Workflow which was configured in “MyWorkflows” string parameter, that is, the Route Optimization workflow (with 10 steps defined).

In order to configure the steps for the other workflows, one may just select the respective value for indexWorkflowOrder at the top in the Data page.

For instance, 3 steps may be configured for the 2nd workflow Inventory Management as follows:


Similarly, an example of configuring 4 steps for the 3rd workflow Quality Assurance is illustrated here:



Please do not use a page configured with the Wizard in a Workflow, this will result in unwanted behaviour.

workflowPageState and pageDataState

The workflowPageState determines the state of a step in the workflow. A step can have an Active (displayed and accessible), Inactive (displayed and not accessible) or Hidden (not displayed) state. This state is used to control the flow of actions in the workflow. Some steps can be made accessible only when certain conditions are met. For example, in a sequential workflow the next step should be accessible only when the current step is considered done.


The pageDataState determines the data state of a page. This state indicates if a step is Complete, Incomplete or in an Error state. There is a default (Empty) state as well when a certain step does not need a data state, for example an “Instruction” or an “Introduction” type of page.


These two states are actually interdependent, hence the style of a displayed step may change accordingly as illustrated below:


These states can be changed dynamically, as required, and as the user progresses in the workflow. This is achievable either by applying data changes made on a page or by using model procedures which are triggered based on certain actions in the front end.


To make changes on the page please ensure the workflowPageState is Active. Or, before configuring the workflow steps, first make changes to the respective pages and then configure the workflow steps. When the workflowPageState is Inactive or Hidden you will not be able to access the respective page.


In the case of an invalid pageId or when the workflowPageState for a certain step is Inactive or Hidden, the workflow will be redirected to the page indicated by the redirectPageId. This is a fallback scenario for the situation in which a user tries to access a page in a workflow, via the Menu or by an OpenPage procedure defined somewhere in the application, but the page is not made available to the workflow yet. The redirectPageId is typically a page which is part of the same workflow. This ensures that the user stays in the workflow and learns that a previous step needs to be completed before accessing other steps of the workflow.

When the redirectPageId is also invalid or not defined, an error is generated and the workflow stays on the current step. There is also a possibility that the workflow steps enter a loop, in which case the redirection is applied 25 times, after which an error is generated and the workflow stays on the current step page.

Changing states

As mentioned earlier, the workflowPageState and pageDataState can be changed dynamically while the user performs actions in the workflow. The user can also be restricted from leaving a certain step if some data is incorrect or certain actions need to be performed before moving to any other step or page.

To change the workflowPageState of a step in a workflow, simply reference the workflow and the step number in the “MyWorkflowSteps” string parameter and assign the desired value. For example:

MyWorkflowSteps(1, 2, 'workflowPageState') := "Active";

The above illustration sets the workflowPageState for Step 2 i.e. Inventory Allocation in Workflow 1 i.e Route Optimization to “Active”.


Similarly, to change pageDataState an assignment statement like the following may be used in a model procedure:

MyWorkflowSteps(1, 2, 'pageDataState') := 'Complete';

If you need to validate some data or actions and maybe to retain the user on the same step, please follow the steps explained in Procedure for Restricting Page Navigation. .

Configuring Workflows in the Application Settings

To enable the Workflow Panel click on the Application Extensions icon ApplicationExtension of the Application Settings and add the configured string parameters to the respective fields as illustrated below:


Once the string parameters are added in their respective fields, the Workflow Panel functionality will become visible on the pages which are part of a workflow.

Last Updated: April, 2020