Harmonizing CMMI-DEV 1.2 and XP Method to Improve The Software Development Processes in Small Software Development Firms

Most software development organizations are small firms, and they have realized the need to manage and improve their software development and management activities. Traditional Software Process Improvement (SPI) models and standards are not realistic for these firms because of high cost, limited resources and strict project deadlines. Therefore, these firms need a lightweight software development method and an appropriate SPI model to manage and improve their software development and management processes. This study aims to construct a suitable software development process improvement framework for Small Software Development Firms (SSDFs) based on eXtreme Programming (XP) method and Capability Maturity Model Integration for Development Version 1.2 (CMMI-Dev1.2) model. Four stages are involved in developing the framework: (1) aligning XP practices to the specific goals of CMMI-Dev1.2 Key Process Areas (KPAs); (2) developing the proposed software development process improvement framework based on extending XP method by adapting the Extension-Based Approach (EBA), CMMI-Dev1.2, and generic elements of the SPI framework; (3) verifying the compatibility of the proposed framework to the KPAs of CMMI-Dev1.2 by using focus group method coupled with Delphi technique; and (4) validating the modified framework by using CMMI-Dev1.2 questionnaire as a main item to validate the suitability of the modified framework for SSDFs, and conducting two case studies to validate the applicability and effectiveness of this framework for these firms. The result of aligning XP practices to the KPAs of CMMI-Dev1.2 shows that twelve KPAs are largely supported by XP practices, eight KPAs are partially supported by XP practices, and two KPAs are not-supported by XP practices. The main contributions of this study are: software development process improvement framework for SSDFs, elicit better understanding of how to construct the framework, and quality improvement of the software development processes. There are possible avenues for extending this research to fulfil the missing specific practices of several KPAs, examining other agile practices and using CMMI-Dev1.3 to improve the framework, and conducting more case studie

Investigating the relationship between software process improvement, situational change, and business success in software SMEs

While we have learned a great deal from Software Process Improvement (SPI) research to date, no earlier study has been designed from the outset to examine the relationship between SPI and business success in software development small- to- medium- sized companies (software SMEs). Since business processes are generally acknowledged as having an important role to play in supporting business success, it follows that the software development process (a large and complex component of the overall business process) has an important contribution to make in supporting business success in software development companies. However, to date we have very little evidence regarding the role of SPI in supporting business success, especially for software SMEs. The need for SPI is dependent on the extent of situational change in a software development setting, and therefore any examination of the relationship between SPI and business success would be deficient if it did not also examine the extent of situational change. Therefore, this thesis describes a novel approach to examining SPI, situational change and business success in software development companies. Furthermore, having discharged this new approach to 15 software SMEs, this thesis makes the important new discovery that the amount of SPI implemented in a software SME is positively associated with the extent of business success – especially when the degree of situational change is taken into account. This thesis describes the first published study to examine the relationship between SPI, situational change and business success in software SMEs. The findings suggest that there are business benefits to implementing SPI in software SMEs, with the degree of situational change being an important factor informing SPI initiatives. Furthermore, this research has yielded valuable new insights into the nature of SPI, situational change and business success in software SMEs

Methods to evaluate lightweight software process assessment methods based on evaluation theory and engineering design principles

Achieving a mature software development process has become essential for many software organizations. A mature development process permits software organizations to provide their customers with a high quality software product delivered on time and within budget. Software organizations have been struggling for decades to improve the quality of their products by improving their software development processes. Designing an improvement program for a software development process is a demanding and complex task. This task consists of two main processes: the assessment process and the improvement process. A successful improvement process requires first a successful assessment; failing to assess the organization's software development process could create unsatisfactory results. Software processes assessment (SPA) can be used either to determine the capability of another organization, for subcontracting purposes, or to determine and understand the status of the organization's current processes to initiate an improvement process. The increasing number of assessment approaches available; the ISO 15504 standard that sets out the requirements for process assessment; and the popularity of the CMMI model, illustrate the relevance of software process assessment for the software development industry. Currently, several methods are available to assess the maturity and capability of a software development process based on well-known software process assessment and improvement frameworks such as CMMI and ISO-15504. The success of these assessment methods and improvement frameworks is supported by post-development studies on the validity, reliability and effectiveness of these methods. Unfortunately, many researchers consider that such methods are too large to implement in SME organizations. As a result, many researchers have studied process assessment and improvement in SME organizations and proposed assessment methods, usually called lightweight SPA methods, suitable to the organizations' needs. The current research in the SPA field focuses on proposing convenient and easy-to-use assessment methods, without investigating to what extent the design of these methods is related to the engineering design perspective. This unclear alignment with the engineering discipline raises questions about the relevance and representativeness of the results produced by these methods from an engineering viewpoint. Moreover, although numerous SPA methods are currently available which offer help and guidance, unfortunately they only partially address evidences found essential for achieving an SPA success. This thesis presents and discusses the evaluation of lightweight SPA methods. The evaluation is two-fold: evaluating the SPA methods design using a top-down approach and based on engineering viewpoints and evaluating the success of SPA methods using a bottom-up approach. The evaluation theory concepts are used as a framework to formally develop both evaluation methods. To develop the first evaluation method using the top-down approach, an exploratory analytical study of SPA methods from an engineering design viewpoint has been conducted. Vincenti's classification has been used as a tool for this analysis. The aim of this exploratory study is to put the developed SPA methods into an engineering design framework, and use this framework as a guideline to put the new SPA methods to be designed into the same engineering design framework. To develop the second evaluation method using the bottom-up approach, a systematic literature review was conducted to extract the set of evidences for the success of the SPA method based on requirements, observations, lessons learned and recommendations which have been formulated within the industry and published in books, conferences and journals. The development process of the two evaluation methods has then been verified using a set of verification criteria and the proposed evaluation methods were tested by conducting three case studies. The first evaluation method would be useful mainly for the designers of new SPA methods during the design phase, while the second evaluation method would be useful for both designers and practitioners of SPA methods to verify the success of the assessment method in question. This research project forms an entry point to study the alignment of SPA methods design with engineering design principles and sheds light on achieving successful assessment results by studying the successful evidences that should be supported by assessment methods separated from the improvement process. The proposed evaluation methods in this thesis have great benefits for SPA methods designed mainly for SME organizations, because these assessments methods, contrary to well-known methods, lack comprehensive studies on their reliability and effectiveness

A Low-Overhead Method for Software Process Appraisal

This paper describes a low-overhead method of software process appraisal that has been developed and used by the Centre for Software Process Technologies (CSPT) to appraise small-to-medium-sized software development organisations in Northern Ireland (NI) that have little or no experience of software process improvement programmes. During the appraisal, information is collected and reviewed to produce a findings report. The findings report consists of a list of strengths, issues and suggested actions for each of the process areas evaluated. The suggested actions detail how the assessed company may improve their processes in line with their business goals. Because the NI software industry is mainly composed of small-to-medium sized software development companies, it is sometimes difficult, both in terms of financial expense and time, for such companies to engage in regular appraisals with the CSPT appraisal team. Therefore, since the main purpose of the CSPT is to instil a software process improvement culture into the NI software industry a pragmatic and relatively non-evasive solution has been developed. This solution has two parts. The first part enables an initial software process appraisal to be performed on-site by the CSPT appraisal team. The second part is an on-line appraisal tool used by the company itself during follow-on periodic self-appraisals