Incorporating incremental validation and impact analysis into spreadsheet maintenance: an empirical study

Spreadsheets are among the most common form of software in use today. Unlike more traditional forms of software however, spreadsheets are created and maintained by end users with little or no programming experience. As a result, a high percentage of these "programs" contain errors. Unfortunately, software engineering research has for the most part ignored this problem. We have developed a methodology that is designed to aid end users in developing, testing, and maintaining spreadsheets. The methodology communicates testing information and information about the impact of cell changes to users in a manner that does not require an understanding of formal testing theory or the behind the scenes mechanisms. The paper presents the results of an empirical study that shows that, during maintenance, end users using our methodology were more accurate in making changes and did a significantly better job of validating their spreadsheets than end users without the methodology.