(國防科學技術大學 計算機學院,湖南 長沙 410073)
摘要：識別數據移動時，有些情況下移動數據組的多個操作應該識別為一個數據移動，COSMIC方法稱之為數據移動唯一性。數據移動唯一性的判斷對度量結果有著直接影響，而COSMIC關于數據移動唯一性的判斷存在兩個問題：一是數據移動唯一性的定義不清楚；二是數據移動唯一性判斷沒有明確規則和清晰流程。本文在度量實踐的基礎上，明確了數據移動唯一性的定義，分析了度量實踐中數據移動唯一性的4種常見錯誤，梳理和總結了數據移動唯一性的規則，形成了數據移動唯一性判斷的檢查表和應用流程。最后，通過實例驗證，以上定義、規則、流程可有效避免數據移動唯一性判斷的錯誤。
關鍵字：COSMIC；數據移動唯一性；常見錯誤；檢查表；應用流程
中圖分類號：TP311.5 文獻標識碼：A 文章編號：
Several Question about COSMIC Data Movement Uniqueness
XU Zhi ，HE Hong-jun, MAI Xin-hui, LIU Qing-he
(College of Computer, National University of Defense Technology, Changsha Hunan 410073, China)
Abstract:When identifying data movements, in some cases more than one data manipulations that moved data group(s) are associated with one data movement, which is defined as the data movement uniqueness. The judgment of data movement uniqueness has a direct impact on the measurement results. But in COSMIC method the judgment has two problems: one is that the definition of data movement uniqueness is not very clear; the other is that there are no clear rules and clear processes. Base on measurement practice, this paper clarifies the definition, analysis four usual mistakes; summarize the rules, and make a checklist and application process. In the end, examples verify that those definitions, rules and process above could help to avoid making errors in the judgment of data movement uniqueness.
Keywords: COSMIC; Data movement uniqueness; usual mistakes; Checklist;Application process
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作者簡介：徐智，男，湖南長沙國防科學技術大學計算機學院，2011級工程碩士，計算機應用專業
