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e Case(用例)權(quán)值定義如下:類別復(fù)雜度復(fù)朵度標(biāo)準(zhǔn)權(quán)值A(chǔ)ctorSimpleGUI1AverageInteractive or protocaldriver interface2ComplexAPI / low level interactions3Use CaseSimple13 transactions/scenarios(事務(wù)/場景)5Average47 transactions/scenarios(事務(wù)/場景)10Complex7 transactions/scenarios(事務(wù)/場景)15 估算TCF調(diào)整因子估算TCF(Technical Complexity Factor,技術(shù)復(fù)雜度因素),要考慮以下因素:FactorDescriptionValue(05)WeightExtended ValueT1Distributed system 分布式系統(tǒng)2T2Response objectives 響應(yīng)或吞吐量績效要求2T3Enduser efficiency 終端用戶效率(聯(lián)機(jī))1T4Complex internal processing 復(fù)雜的內(nèi)部處理過程1T5Reusable code 可重用性1T6Easy to install 易安裝性T7Easy to use 易使用性T8Portable 可移植性2T9Easy to change 易更改性1T10Concurrent 并發(fā)處理要求1T11Security features 安全要求1T12Provides direct access for third parties 為第三方提供訪問接口1T13Special user training required 特殊的用戶培訓(xùn)要求1Tfactor (sum of extended values) =Technical Complexity Factor (TCF) = + ( *Tfactor) = 其中:1. Extended Value = Value * Weight2. Weight值已給定3. Value根據(jù)各因素的影響等級來確定:l 0:表明因素與項(xiàng)目無關(guān)l 3:影響程度中等l 5:表示必不可少的因素,在整個(gè)軟件開發(fā)過程中都有較強(qiáng)的影響 估算EF調(diào)整因子估算EF(Environmental Factor,環(huán)境因素),要考慮以下因素:FactorDescriptionValue(05)WeightExtended ValueT1Familiar with UML ,熟悉UMLT2Application experience,開發(fā)經(jīng)驗(yàn)