Impact-Estimate

Definition:

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Detailing

A full Value-Decision-Impact-Estimate includes the following: a Scale-Impact, a Percentage-Impact and uncertainty data (known Error margins). The additional related information required to support an Value-Decision-Impact-Estimate includes the evidence, source(s) and Credibility.

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Illustrations

Illustration: none

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Type

[Value-Desicion-Impact-Estimate *433]: Scalar Design Metric

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Examples

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Notes

Notes:
1. An Value-Desicion-Impact-Estimate can be positive, neutral or negative (undesirable in relation to stated target Levels).

2. Note the distinction between a Scale-Impact (an absolute numeric value on a Scale), and a Percentage-Impact (the percentage improvement estimated to be achieved in moving from the chosen Baseline towards the chosen target).

3. An Value-Decision-Impact-Estimate is usually concerned with the System improvement,
rather than with Stakeholder value (However, this Depends-On the choice of
Requirement Attribute: Stakeholder value can be tackled, for example,
Financial Saving).

4. An Value-Decision-Impact-Estimate is usually on a Scalar Requirement. However, much more rarely, it can be on a Binary Requirement of the System (that is on a Function-Requirement, a Design-Constraint or a Condition-Constraint). This is used in situations where an explicit Check is considered necessary to help evaluate Design-Ideas.

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Keyed-Icons

Keyed-Icon [Value-Desicion-Impact-Estimate *433]: ->.#
Note: the icon is made up of the Impact symbol “->“ and the estimate symbol “#”, with the “.” indicating that it is made up of two Concepts.

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Drawn-Icons

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Related-Concepts

Impact *087
Scale-Impact *403
Percentage-Impact *306
Side-Effect *273

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History-of-Concept

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This Concept entered by Kay Dudman.