The Analysis and Use of Software Reliability and Quality Data
Document Number SR-1547
Issue Number 02
Issue Date Dec 2000
Replaces SR-TSY-001547 Issue01
ABSTRACT: This document replaces SR-TSY-001547, Issue 1, January 1990, but contains NO TECHNICAL CHANGES from that document. It has been
reissued strictly to conform to the Telcordia Technologies document format.
The analysis of any process or product depends on the judicious use of measurements, i.e., data. Organizations can spend tremendous
resources on collecting data without careful consideration of why they are engaged in these activities and how the data are to be
analyzed once collected. This can result in organizations proposing elaborate guidelines and requirements for the collection of data
while giving only vague indications of the purpose of the data collection.
This Special Report (SR) takes the general point of view that the main reason for collecting reliability and quality data is to
analyze it in such a way that objective conclusions and decisions can be made. The SR presents the Telcordia view of methods for
measuring, analyzing, and modeling software reliability and quality. An attempt has been made to avoid overly complex models; however,
in some cases, successful use of the methods does require software that is not included. This document applies to network switching
elements (local switch, tandem switch, signal transfer point, etc.), transport products, operational support systems, or other
software-controlled systems used by a typical Local Exchange Carrier (LEC).