Estimate the cost of a requirement
1.2 * (@Man\ days * 150 + ext@Manufacturing\ Cost)
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Here, we see that the result for requirement AA-003 is marked as error because the property @Man days used in the calculation is not a valid number.
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Estimate the total cost of a parent requirement
SUM(ext@Cost, from@Refines child)
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Detect when a parent requirement is over budget
SUM(ext@Cost, from@Uses child@Uses) > @Budget
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Detect when parts composing an assembly are too heavy
SUM(@Weight, child@Refines→child@Uses) > @Max\ weight
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Here, we see that the result for requirement AA-003 is marked as error because the property @Weight used in the calculation is not a valid number.
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