ALLOCATION FEATURES

Allocation identifies the amount of parameter variation that will improve a response's variation to a desired level. (This is often referred to as statistical tolerancing or requirements flowdown.) With allocation you can specify a desired value for response standard deviation or response PNC (Probability of Non-Compliance) and the algorithm will compute a vector of parameter standard deviations that will meet your objective. Driver values are used to help guide the parameter standard deviations in sensible directions.

Features:

• Identify tolerances that are too tight or too loose
• Quantify risk of not meeting requirements
• Easy-to-use and learn interface
• Unlimited number of factors*
• Truly statistical tolerancing
• Define parameter variability budgets and tolerances that strike the right balance between quality & cost
• Advanced calculations for numerical derivatives
• 2nd-order analysis
• User-selectable allocation drivers
• Nonlinearity test and warning

*Constrained only by worksheet size/memory limits in MS Excel™

Using Allocation in Product Development

When a response’s variation is computed with sensitivity analysis, very often the amount of variation is not ideal. Perhaps the response’s standard deviation or Probability of Non-Compliance (PNC) is too large. Or on the other hand, perhaps some of the parameters’ standard deviations are much smaller than they need to be, leading to higher costs of such tight control.

With allocation you can specify a desired value for response standard deviation or response PNC and the algorithm will compute a vector of parameter standard deviations that will meet your objective. Driver values are used to help guide the parameter standard deviations in sensible directions.