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This was necessary because half the respondents were to be women and only female data collectors could ask them questions on such sensitive subjects as contraception . Besides improving the quality of life for employees , those changes are financially necessary because workplace stress inflicts high costs on the economy , she said , noting estimates of $ 300 billion lost or spent annually because of absenteeism , employee turnover , lost productivity and medical , legal and insurance fees related to stress . This second step is necessary because GATOR defaults to rel = " A " selection , and the catalog selection rules are different than the reliability scoring rules , resulting in the inclusion in the 6x-PSC of a small fraction of sources that have reliability scoring lower than " A " . Lynden argues that a more comprehensive review was necessary because Cedar Bay had no prior experience in the delivery of mail in Alaska and no demonstrated capability to perform timely delivery service . Each group covered has been specifically designed to offer insight into the characteristics , needs and behavior of modern consumers , necessary because simple socio-demographic segmentations no longer provide sufficient insight .