MAP-01-011 HFI Technical Guide - Human Factors Integration ...

MAP-01-011 – HFI Technical Guide (STGP 11)• TCTA relies upon interviewee verbal reports in order to reconstructincidents. How far a verbal report accurately represents the cognitiveprocesses of the decision maker is questionable. Interviewees could easilymisrepresent facts. Certainly, glorification of events would be one worryassociated with this sort of analysis.• After the fact data collection has a number of concerns associated with it.Such as degradation, correlation with performance etc.A3.9.4Groupware Task AnalysisGroupware Task Analysis (GTA) is a team task analysis technique that is used tostudy and evaluate group or team activities in order to inform the design andanalysis of similar team systems. GTA comprises a conceptual frameworkfocussing upon the relevant aspects that require consideration when designingsystems or processes for teams or organisation. The technique entails thedescription of two task models.1. Task model 1 – Task model 1 is essentially a description of the situation atthe current time in the system that is being designed. This is developed inorder to enhance the design teams understanding of the current worksituation. In the design of C4I systems, Task Model 1 would include adescription of the command and control systems that are currently used.2. Task model 2 – Task model 2 involves re-designing the current system orsituation outlined in task model 1. This should include technologicalsolutions to problems highlighted in task model 1 and also technologicalanswers to requirements specified. Task model 2 should represent amodel of the future task world when the new design is implemented.The techniques used when conducting a GTA are determined by the availableresources. Once the two task models are completed, the design of the newsystem can begin, including specification of functionality and also the way inwhich the system is presented to the user.• Advantages• GTA output provides a detailed description of the system requirements andhighlights specific issues that need to be addressed in the new design.• Task model 2 can potentially highlight the technologies required and theiravailability.• GTA provides the design team with a detailed understanding of the currentsituation and problems.• GTA seems to be suited to the analysis of existing command and controlsystems.May 2006 Page A3-78 Issue 4