Operation Sequence Diagram
Acronym
OSD
Description
Operation sequence diagrams (OSD) are graphical representations of team interaction in a network. They portray how tasks are performed and how individuals interact over time.
Uses
To portray graphically how teams interact in a network.
How do I use this tool?
1. DEFINE THE TASK(S) UNDER ANALYSIS clearly. This should include the activity in addition to the individuals involved.
2. DATA COLLECTION. Collect data relevant to the task or scenario being analyzed. The methods and type of data gathered will be dependent on the goals of the analysis.
3. DESCRIBE THE TASK OR SCENARIO USING HIERARCHICAL TASK ANALYSIS (HTA).
4. BEGIN CONSTRUCTION OF THE OSD. Start by creating the OSD template, including the task being analyzed, a timeline, and a row for each type of personnel involved in the task.
5. OVERLAY ADDITIONAL ANALYSIS RESULTS.
6. CALCULATE OPERATION LOADING FIGURES for each agent involved in the task. These figures refer to the frequency which an agent was involved with an operator during the task.
Expertise Required
Users of this tool usually have some training or experience in its use.
Advantages
Is useful for analyzing distributed or collaborative tasks.
Provides effective means of demonstrating the relationship between team members, tasks, and technology.
Disadvantages
Is time consuming.
Can be confusing to interpret.
Where can I go to learn more?
Stanton N, Salmon P, Walker G, et al. Process charting methods. Human factors methods: a practical guide for engineering and design. Great Britain: Ashgate; 2005. p. 109-37.