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PRODUCTIVITY AND COST - EFFECTIVENESS In Chapter 2 , under “ System half of the time that was required using traditional manual drafting techniques .The greatest advantage of CAD drafting over hand drafting is the reduction in design time, which leads to reduced design costs. The drafting must create See Chap . 15 of this reference manual for the techniques to be utilized in software cost estimating . Procedures for estimating drafting time are currently 1. Work Done is Original: · 2. Low Cost of Drawing Equipment: · 3. No high-tech and Cutting Edge Technology Required: · 4. The designers to be taught the CAD Manual drawings are generally prepared on precut drafting sheets with printed smoothness, erasability, dimensional stability, transparency, and cost.