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Related to Attrition: Attrition bias
The slow, gradual reduction of members in a company or organization due to retirement, resignation or death. That is, members lost through attrition are not replaced in the same numbers. Attrition may be deliberate; that is, if a company is downsizing, it may prefer to lose employees through attrition rather than to conduct layoffs. Other times, however, attrition may be a sign of a weak company or organization unable to attract talent. Attrition is also called natural wastage.