Why does implementation fail without a workflow analysis particularly in healthcare? Why did it fail and what happened as a result?

A group meeting sometimes is suggested as a useful compromise between interviews and questionnaires. In such a group meeting, one systems analyst meets with and asks questions of a number of users at one time. Discuss the advantages and disadvantages of such a group meeting.

When conducting A/B testing, a software vendor may be highly motivated to enhance or modify their product to resolve issues that negatively impact workflow.  In cases such as this, A/B testing may be an iterative process.  How does this impact your project plan and timeline, and is there a potential limit to how many times you are willing to have your team re-test an application and limit to how much time you are willing to dedicate to this process? Pleas provide a resource.

what are the strengths and weaknesses of PRECEDE-PROCEED model program planning model and strengths and the weaknesses  in the logic model