The order of displaying the subtasks during implementation is normally the same as the order of the subtasks after breaking down the task during design; however, there are exceptions. For example, when using the support system while proceeding to the next step, operations involving buttons or voices should be used. In such cases, it is better to aim for improving efficiency through reducing the number of transitions by displaying the following subtasks successively.

Of the successive subtasks, the ones with the following characteristics can be displayed. 

  • Displaying both the successive subtasks A and B makes the work easier to understand.
  • The links between the successive-subtasks A and B have important implications.
  • The contents of the successive tasks are simple and work is easy to understand and all information can be displayed within the available area of the display screen.

The following table is prepared after completing the subtask design in a specific manner.   Example: In the design table created, when the “Take a yellow block” and “Place the yellow block” are combined 

When the subtask table is displayed this way, it is better to clearly show the order of the operation by displaying the information (text) representing the order relationship.

Example: Using an arrow to show the position of a yellow block that the user needs to pick up, while at the same time showing the location of the placement using an arrow and line frame.