Group Approximation of Task Duration and Time Buffers in Scrum

Abstract

Expansion of modern IT technologies, which took place last years, caused a significant increase in software projects. Those projects are quite often complex venture burdened with high risk. Nowadays, a large number of software projects is managed using Scrum framework. In Scrum, where people form self-organizing team, group decisions became an essential element of the project, which plays an important role to create time approximation or to manage potential risks. This paper focuses on group decisions, temporal aspects of estimation and risk management in Scrum project. In article we present conceptual model of extension Scrum framework by risk management process in aspect of project time estimation. Proposed model contains time buffers based on mixture probability distribution, which improve Scrum framework in terms of group estimation. We also depict case study which presents time approximation process which took place in one of a Scrum project.