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Root Causes of Misleading Results Generated By PPM Tools by Mind Map: Root Causes of Misleading Results Generated By PPM Tools
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Root Causes of Misleading Results Generated By PPM Tools

1. Low Data Quality

1.1 lack of completeness

1.2 lack of timeliness

1.3. inaccurately entered data

1.4. imprecisely entered data

2. Misleading Outputs (will occur even if data quality is perfect)

2.1 Input interdependencies that are hidden -- for example, the tool calculates an output -- e.g. the existence of a particular bottleneck -- based on three inputs. Depending on how sensitive the output is to the existence of and the accuracy of each input variable the calculated output can turn out to be useless. This is a pernicious because it is hidden to the user of the tooland puts the user in the dangerous position of making bad decisions due to algorithmic subtleties. In other words, the user has no grip on the amount of variance in the result. This makes it dangerous to base decisions on this output.

2.2 Divergence of actual resource management processes from the processes dictated by the tool

2.3 When multiple models are used (most PPM tools contain project, portfolio, resource management modules), the inputs and outputs of each of these sub-models can have unknown interdependencies that drive systematic or unsystematic error.

2.4 Parameters or constants of the model change and these are not part of the experiential feedback loop for the model (this could include weights of variables or strengths of connections between variables.

2.5 Variables of the model change or new ones need to be added

2.6 Algorithm changes

2.7 Model changes (i.e. both variables and algorithm change)