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The Just-In-Time (JIT) method of data analysis has the virtue of immediacy, rapid turn-around, and team involvement; however there are several disadvantages. First, this type of analysis is problem-focused, rather than goal-focused. Long lists of problems are generated, but there is no clear relation to specific usability goals. Second, developers may not be able to fix things immediately so the context of the problem may be lost when it is time to fix the problem. Third, the JIT analysis requires that the entire development team observe the testing sessions since problems may occur that are the responsibility of different developers.
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Analyzing and Reporting Usability Data
http://www.stcsig.org/usability/newsletter/9710-analyzing-data.html
Wilson, Chauncey E.
Usability Interface
1997
Abstract: The Just-In-Time (JIT) method of data analysis has the virtue of immediacy, rapid turn-around, and team involvement; however there are several disadvantages. First, this type of analysis is problem-focused, rather than goal-focused. Long lists of problems are generated, but there is no clear relation to specific usability goals. Second, developers may not be able to fix things immediately so the context of the problem may be lost when it is time to fix the problem. Third, the JIT analysis requires that the entire development team observe the testing sessions since problems may occur that are the responsibility of different developers.
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