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picture1_Writing Ppt 69536 | Cost Item Download 2022-08-29 14-10-05


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File: Writing Ppt 69536 | Cost Item Download 2022-08-29 14-10-05
cost estimation topics quantitative models e 2 5 kloc1 05 qualitative models e g expert estimation agile cost estimation relate cost to development time se cost estimation hans van vliet ...

icon picture PPT Filetype Power Point PPT | Posted on 29 Aug 2022 | 3 years ago
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          Cost estimation, topics
          Quantitative models (E = 2.5 KLOC1.05)
          Qualitative models (e.g. expert estimation)
          Agile cost estimation
          Relate cost to development time
                                                               SE, Cost estimation, Hans van Vliet,  ©2008      2
          On productivity
          Even if quantitative models are not that good, the 
             cost drivers of these models learn us about 
             productivity:
                Writing less code helps
                Reuse helps
                Quality of people is important
                Tools help
                …
                                                               SE, Cost estimation, Hans van Vliet,  ©2008      3
          Algorithmic models
          Base formula: E = a + bKLOCc
          C usually is around 1
          C > 1: diseconomy of scale
          C < 1: economy of scale
          This nominal cost is multiplied by a number of cost 
             drivers (volatility of requirements, amount of 
             documentation required, CMM level, quality of 
             people, …)
                                                               SE, Cost estimation, Hans van Vliet,  ©2008      4
          Walston-Felix
          One of the early algorithmic models (1977)
          Many factors (29 out of 51 projects)
          Only three alternatives (high, medium, low) per 
             factor
          Its form influenced many later models
                                                               SE, Cost estimation, Hans van Vliet,  ©2008      5
          COCOMO (COnstructive COst MOdel)
          Very well-documented (Boehm book, 1981)
          Basic form: E = bKLOCc, where b (~3) and c (1+ε) 
             depend on the type of project (mode):
                Organic: relatively small and well-known
                Embedded: inflexible environment with many constraints
                Semidetached: somewhere in between
          More complex form: takes into account 15 
             multiplicative cost drivers
                                                               SE, Cost estimation, Hans van Vliet,  ©2008      6
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...Cost estimation topics quantitative models e kloc qualitative g expert agile relate to development time se hans van vliet on productivity even if are not that good the drivers of these learn us about writing less code helps reuse quality people is important tools help algorithmic base formula a bklocc c usually around diseconomy scale economy this nominal multiplied by number volatility requirements amount documentation required cmm level walston felix one early many factors out projects only three alternatives high medium low per factor its form influenced later cocomo constructive model very well documented boehm book basic where b and depend type project mode organic relatively small known embedded inflexible environment with constraints semidetached somewhere in between more complex takes into account multiplicative...

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