Quantitative Non Functional Requirements evaluation
using softgoal weight

Nobuhide Kobayashi⁺, Shuji Morisaki, Noritoshi Atsumi, and Shuichiro Yamamoto

Nagoya University, Nagoya, Aichi 4648601 Japan
kobayashi.nobuhide@j.mbox.nagoya-u.ac.jp, S.Morisaki.JP@ieee.org, atsumi@nagoya-u.jp, syamamoto@acm.org

Abstract

The goal oriented requirements analysis approaches have been introduced to compare non-functional requirements (NFR), such as safety and security. Several approaches to manage goal attributes have also been proposed to evaluate NFR goals quantitatively. In this paper, the quantitative weighted softgoal is proposed based on the Softgoal Interdependency Graphs (SIG) that helps engineers evaluate non-functional requirements. The evaluation results of the weighted SIG applications are shown to develop non-functional requirements and choose alternative design decisions. Additionally, the industrial case study of the weighted softgoal is shown to select the appropriate architecture decision in an automotive software development domain.

Keywords: Non-Functional Requirements, NFR framework, Softgoal Interdependency Graphs,
softgoal weight, Attributed Goal Graph

+: Corresponding author: Nobuhide Kobayashi
Strategy Ofﬁce, Information and Communications Headquarters, Nagoya University,
Furo-cho Chikusa-ku, Nagoya Aichi, 4648601, Japan
Tel: +81-52-238-0487

Journal of Internet Services and Information Security (JISIS), 6(1): 37-46, February 2016 [pdf]