{"title":"实体关系图中的基本结构:一种新的工作量估算度量","authors":"G. Kennedy","doi":"10.1109/SEEP.1996.533985","DOIUrl":null,"url":null,"abstract":"The paper describes a systematic treatment of the entity relationship diagram, resulting in the identification of three elementary data structures. Recognition of these structures is shown to constitute a useful analytical and diagnostic tool for data modelling. An algorithm for counting the number of occurrences of each type of structure in a data model is presented and the possibility is explored of using these values as the basis for a metric for system development effort estimation. Such a metric could be applied earlier in the development cycle than others currently in use. For a specific class of system an empirical expression for the estimation of development effort is determined.","PeriodicalId":416862,"journal":{"name":"Proceedings 1996 International Conference Software Engineering: Education and Practice","volume":"75 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1996-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":"{\"title\":\"Elementary structures in entity-relationship diagrams: a new metric for effort estimation\",\"authors\":\"G. Kennedy\",\"doi\":\"10.1109/SEEP.1996.533985\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The paper describes a systematic treatment of the entity relationship diagram, resulting in the identification of three elementary data structures. Recognition of these structures is shown to constitute a useful analytical and diagnostic tool for data modelling. An algorithm for counting the number of occurrences of each type of structure in a data model is presented and the possibility is explored of using these values as the basis for a metric for system development effort estimation. Such a metric could be applied earlier in the development cycle than others currently in use. For a specific class of system an empirical expression for the estimation of development effort is determined.\",\"PeriodicalId\":416862,\"journal\":{\"name\":\"Proceedings 1996 International Conference Software Engineering: Education and Practice\",\"volume\":\"75 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1996-01-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings 1996 International Conference Software Engineering: Education and Practice\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/SEEP.1996.533985\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings 1996 International Conference Software Engineering: Education and Practice","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SEEP.1996.533985","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Elementary structures in entity-relationship diagrams: a new metric for effort estimation
The paper describes a systematic treatment of the entity relationship diagram, resulting in the identification of three elementary data structures. Recognition of these structures is shown to constitute a useful analytical and diagnostic tool for data modelling. An algorithm for counting the number of occurrences of each type of structure in a data model is presented and the possibility is explored of using these values as the basis for a metric for system development effort estimation. Such a metric could be applied earlier in the development cycle than others currently in use. For a specific class of system an empirical expression for the estimation of development effort is determined.