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new-additions/evpi-takeoff.md

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+# EVPI Takeoff
+
+Expected value of perfect information (EVPI)
+
+The perceived *value* of decreased uncertainty
+must be weighed against its *cost*.
+
+Takeoff purchases certainty with estimator hours.
+Estimator hours have a not insubstantial real cost in salary and burden,
+however the opportunity cost may exceed this.
+
+Count-based takeoff speed increases with count.
+
+***
+
+Optimizing the takeoff process means:
+
+* *Minimizing* the need for information outside of drawings
+* *Maximizing* organizational consistency
+
+***
+
+Recent events have complicated my philosophy above.
+It appears that similar efforts have already been made here,
+their success being a matter of perspective.
+
+## Naming Conventions (Use Case vs. Description)
+
+Naming by use case is intuitive for those without estimating or field experience,
+but has the side effect that those acustomed to the names will inevitably treat them as descriptive.