北京航空航天出版社
The"mythicalman-month"referstothedecreaseinproductivityasdesignersareaddedtoaproject.Thisisduetothefactthatasteamsizesincreasetheamountoftimeneededfororganizationandcommunicationstarttoexceedthetimeadesignerisabletogetactualworkaccomplished.
1.28Assumeadesigner’sproductivitywhenworkingaloneonaprojectis5,000transistors
permonth.Assumethateachadditionaldesignerreducesproductivityby5%.(Andkeepinmindthisisanextremelysimplifiedmodelofdesignerproductivity!)(a)Plotteammonthlyproductivityversusteamsizeforteamsizesrangingfrom1to40designers.(b)Plotonthesamegraphtheprojectcompletiontimeversusteamsizeforprojectsofsizes100,000and1,000,000transistors.(c)Providethe“optimal”numberofdesignersforeachofthetwoprojects,indicatingthenumberofmonthsrequiredineachcase.transistorsper
teamsizedesignerpermonth
15000
24750
34512.5
44286.875
54072.53125
63868.904688
73675.459453
83491.68648
93317.102156
103151.247049
112993.684696
122844.000461
132701.800438
142566.710416
152438.374896
162316.456151
172200.633343
182090.601676
191986.071592
201886.768013
211792.429612
221702.808131
231617.667725
241536.784339
251459.945122
261386.947866
271317.600472teammonthlyproductivity5000950013537.517147.520362.6562523213.4281325728.2161727933.4918429853.9194131512.4704932930.5316634128.0055435123.405735933.9458336575.6234337063.2984137410.7668437630.8301737735.3602537735.3602537641.0218537461.7788937206.3576736882.8241336498.6280436060.6445135575.21275completionof100,0002010.526315797.3868882735.83175394.9109506534.307851453.8867832633.5799319533.3496439323.1733468833.0366955822.930144862.8471043172.7828839192.7340613942.6980869022.6730272722.6573955332.6500343272.6500343272.6566760172.6693873852.6877126992.7112891262.7398290122.7731062872.810945944completionof1,000,000200105.263157973.8688827358.31753949.1095065343.078514538.8678326335.7993195333.4964393231.7334688330.3669558229.301448628.4710431727.8288391927.3406139426.9808690226.7302727226.5739553326.5003432726.5003432726.5667601726.6938738526.8771269927.1128912627.3982901227.7310628728.10945944
12EmbeddedSystemDesign