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Design Issues in Mechanical Tolerance Analysis (4371 words) |
 | For assemblies with small numbers of components, or which have one component tolerance which is much greater than the remaining components, the common Statistical model can give component tolerances which are tighter than if computed by a Worst Limit model. |
| Statistical models assume manufacturing variations follow a Normal or classic bell-shaped distribution, symmetrically positioned at the midpoint of the tolerance limits. |
| The resultant assembly dimensions are used to calculate the statistical moments of the assembly distribution and then estimate the fraction of rejects. |
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Statistical unit - Wikipedia, the free encyclopedia (164 words) |
| In different statistical disciplines, the statistical unit is the source of a random variable. |
| We may be interested in a unit because we intend to generalize from observations on a few units to a statistical assembly of units. |
| We may be interested in the internal functioning of a unit which we can characterize as a statistical assembly. |
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