Human Performance Technology Models
There are many different models that represent the work of human performance professionals. This is not meant to be an inclusive list, and there are variations on all of these, but this is a good start for helping instructional designers, corporate trainers, human resource professionals, elearning professionals and others become familiar with the field in general.
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This process can be used to diagnose performance problems in individuals and assess if the solution should be a job aid, training, or environmental, tool, organizational system or motivational solution.
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ISPI Performance Technology Standards 
This document from ISPI discusses each of the performance standards of human performance technology for all learning and development, training, eLearning or other types of human performance practicioners.
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ISPI Human Performance Technology Model
This is the standard in human performance technology models.
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This is one of the best articles ever written for a quick start guide to understanding the foundational HPT models. Thank you Frank, Christine and Marty!
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A TOTAL PERFORMANCE SYSTEM 
This model gives examples of how the different performance system components that are proven to impact performance match to the three levels of an organization.
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PROBLEM DEFINITION WORKSHEET
This is a wonderful worksheet for defining a root problem.
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PERFORMACE ANALYSIS WORKSHEET
This is a great worksheet for doing a performance analysis.
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PERFORMACE IS A FUNCTION OF THE INDIVIDUAL AND ENVIRONMENT
This is from anarticle from Fred Nickols entitled "McGregor Meets Gilbert." Read the short 2 page paper to understand some of the different things that contribute to excellent performance.
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SUMMARY OF MANY DIFFERENT MODELS
This is a great article by David Wile that goes through and shows at the end a very comprehensive model for looking at how to improve performance.
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PERFORMACE ANALYSIS FLOWCHART
This is a good performance analysis tool from Bryan Hopkins that takes you from start to finish to identify a root cause and then assign a solution.
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PERFORMACE ANALYSIS WORKSHEET
This is a great worksheet for doing a performance analysis.
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MOTIVATIONAL FACTORS MODEL 
This came from a famous report about what motivates people. It was done by Herzberg and put together by Alan
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PERFORMACE ANALYSIS WORKSHEET
This model is in this worksheet that is Adapted from Mager and Pipe. It takes you through a process of questions to ask at each level.
