Tham khảo tài liệu 'mechanical estimating manual episode 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 8 Mechanical Estimating Manual HOW TO ESTIMATE LABOR ACCURATELY AND REhLIRTtCALLY There are a number of sources and techniques for deriving SEund labor figures for estimating that you can draw from such as jog coot racords. time rtudies uaperia ence previour estimates end ds-tadrd break gown analysis etc os fobtow 1. Know How Labor Varies The factorsthat make laborvary are Size Tppe Materip P Da-tfaal Dupticatiens Numtiee Operations Numbar oe c omfianrnt Pnrts ProduatikhyofMck Puwea Building Conditiono pss embled er Brahan Dswn A single large 50 000 CFM air conditioner broke down into maae p arfs noing mstetied in tyc ntiaodse of a forty stoty eotin pg takes a nns-r amoan- nf laa-u compere to en arfemCleh AC unrt tibio1 install- art me first flour if ae otiiceLssilti ng. 2. Cost Records Labkr on previous similar jobs systems equipment ductwork ate. complatitu m the ggsc is one a r titamos1 valid touvvcg Oo gab oru poua d teftoaoL Your labor record on the previous low rise office building tiowe .Od talfri coted tire low Jtresrvrg enL vanizad dcstworTitt oc Iae hi ghdinsteltei1 0 24 lbs hr cnder naamar buũding cxentitione. Tie-a1 s hi -tai and noabtenni0 date foe Cohrnsat affice AuiEuing . 3. Time Studies Time studies roagli spot checks on single items or grou p el item- in tiee gear lid most unlnobte tita rca tt-labor deta. Wa d ta 1 talkiaig a Hint urrng a sI oz and mzogurino eAerg maHan to dis nth degree rottier a moreAenhraicgdtoonaapuroauA 1 You ask your mechanic in the shop to keep separate time on a W c h machua elbawha happens to Lie fagricoting hbo ha re rtttiockti ton- TIntents. Yon notetiietatwo met ceewtookoomanhour to inotallc 0 tine rate ea Oaeo agc dv ctienrkwcoAi-ing 73 orko muteebe g6 bs he. You record the above times on your time study record sheetg for fatore -a0 meteingretere-re. u heatiti sime studtes maybe neetted ofihe semtritemstodetermmb ttie true ovenago ha. tiierae od - stitea 4. Previous Estimates .
