Cross versus Within-Company Cost Estimation Studies: A Systematic Review

  • Authors:
  • Barbara A. Kitchenham;Emilia Mendes;Guilherme H. Travassos

  • Affiliations:
  • IEEE Computer Society;-;-

  • Venue:
  • IEEE Transactions on Software Engineering
  • Year:
  • 2007

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Abstract

The objective of this paper is to determine under what circumstances individual organizations would be able to rely on cross-company-based estimation models. We performed a systematic review of studies that compared predictions from cross-company models with predictions from within-company models based on analysis of project data. Ten papers compared cross-company and within-company estimation models; however, only seven presented independent results. Of those seven, three found that cross-company models were not significantly different from within-company models, and four found that cross-company models were significantly worse than within-company models. Experimental procedures used by the studies differed making it impossible to undertake formal meta-analysis of the results. The main trend distinguishing study results was that studies with small within-company data sets (i.e.,