@article{oai:ipsj.ixsq.nii.ac.jp:00013074,
 author = {Shaoying, Liu and AJeff.Offutt and Mitsuru, Ohba and Keijiro, Araki and Shaoying, Liu and A, Jeff.Offutt and Mitsuru, Ohba and Keijiro, Araki},
 issue = {6},
 journal = {情報処理学会論文誌},
 month = {Jun},
 note = {In this paper we point out three major deficiencies of data flow diagrams(DFDs)for requirements analysis.One is the impracticability of the rule for decomposing processes another is the inconvenience of drawing data flows for complex DFDs and the third is the lack of precision in process specifications.We present an improved approach using SOFL(Structured-Object-oriented-Formal Language)to show how these deficiencies can be addressed.This approach can be applied to make the use of DFDs more practical scalable and more accessible to industrial users., In this paper we point out three major deficiencies of data flow diagrams(DFDs)for requirements analysis.One is the impracticability of the rule for decomposing processes,another is the inconvenience of drawing data flows for complex DFDs,and the third is the lack of precision in process specifications.We present an improved approach using SOFL(Structured-Object-oriented-Formal Language)to show how these deficiencies can be addressed.This approach can be applied to make the use of DFDs more practical,scalable,and more accessible to industrial users.},
 pages = {1973--1989},
 title = {The SOFL Approach : An Improved Principle for Requirements Analysis},
 volume = {39},
 year = {1998}
}