@misc{13503, author = {Magne J{\o}rgensen}, title = {The Use of Precision of Software Development Effort Estimates to Communicate Uncertainty}, abstract = {The precision of estimates may be applied to communicate theuncertainty of required software development effort. The effort estimates 1000and 975 work-hours, for example, communicate different levels of expectedestimation accuracy. Through observational and experimental studies we foundthat software professionals (i) sometimes, but not in the majority of theexamined projects, used estimate precision to convey effort uncertainty, (ii)tended to interpret overly precise, inaccurate effort estimates as indicating lowdeveloper competence and low trustworthiness of the estimates, while toonarrow effort prediction intervals had the opposite effect. This differenceremained even when the actual effort was known to be outside the narrow effortprediction interval. We identified several challenges related to the use of theprecision of single value estimates to communicate effort uncertainty andrecommend that software professionals use effort prediction intervals, and notthe preciseness of single value estimates, to communicate effort uncertainty.}, year = {2016}, journal = {Software Quality Days. The Future of Systems-and Software Development}, pages = {156-168}, publisher = {Springer International Publishing}, }