Issue No. 01 - January/February (2007 vol. 24)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/MS.2007.12
Christiane Gresse von Wangenheim , Universidade do Vale do Itaja?
Ita Richardson , University of Limerick
Small software organizations—independently financed and organized companies with fewer than 50 employees—are fundamental to many national economies' growth. In the US, Brazil, Canada, China, India, Finland, Ireland, Hungary, and many other countries, small companies represent up to 85 percent of all software organizations. 1,2 However, to persist and grow, small software companies need efficient, effective software engineering solutions. People often believe that good practices and solutions are expensive, time consuming, and targeted more toward large organizations, and therefore difficult to apply in small companies.
Considering the large percentage of small software organizations across the globe, relatively few publications present software engineering solutions focusing specifically on small software companies. In this special issue, we hope to address this gap. Considering their typical characteristics and limitations, how can small organizations apply software engineering methods, techniques, best practices, and tools to improve software quality and productivity without introducing unacceptable overhead?
Large and small software development companies face similar software engineering challenges. They need to manage and improve their software processes, deal with rapid technology advances, maintain their products, operate in a global software environment, and sustain their organizations through growth. However, they often require different approaches because of specific business models and goals, market niche, size, availability of (financial and human) resources, process and management capability, and organizational differences, among other things.
Small companies aren't just scaled-down versions of large firms. 3 Generally, they're extremely responsive and flexible, because that's their advertised competitive advantage. As Richard Daft noted, they typically "have a flat structure, with an organic and free-flowing management style that encourages entrepreneurship and innovation." 4 They usually focus on a market niche that large companies have disregarded, build components for other companies' products, develop innovative products, or offer services or maintenance for products that they or others produce. Unlike large companies, small companies don't have enough staff to develop functional specialties that would enable them to perform complex tasks secondary to their products. However, they might network with other small companies. Tight finances also constrain many small businesses, so they can't always afford to buy required expertise.
The special issue
We received articles for this issue from many countries, reflecting this topic's importance worldwide. The large number of submissions focusing on companies with fewer than 20 employees was an interesting revelation to us; often, researchers consider small organizations together with medium enterprises, not differentiating their specific characteristics. This can affect research results and ultimately the development agencies that are promoting small companies within their own national economic structure. Many submissions we received dealt with software process assessment and improvement, indicating ongoing work in developing national or tailored approaches for small organizations (see the sidebar " Process Initiatives for Small Organizations"). Other topics covered included agile methods, configuration management, reuse, and knowledge management. The four articles finally chosen for this special issue deal with process assessment and improvement, requirements prioritization, version control, and software tool support.
Process assessment and improvement
Several models or standards for software process assessment and improvement are available, including CMM and CMMI, and ISO/IEC 15504 (also known as SPICE). However, many small organizations remain unaware of these methodologies. 1 They also perceive these methods as expensive and time consuming and, therefore, difficult to perform. 5,6
In relation to the most prominent models, new assessment methods tailored to the context of small software companies have been developed, such as, for example, in conformance with ISO/IEC 15504: RAPID (Rapid Assessment for Process Improvement for Software Development), 7 SPINI (Software Process Improvement Initiation), 8 MARES (Método de Avaliação de Processo de Software), 9 and SPIRE (Software Process Improvement in Regions of Europe), 10 among others. Basically, these methods focus on process improvement assessments. They either assess a preselected set of processes or provide an initial step for choosing the processes to assess using a continuous representation, focusing generally on assessments up to Capability Level 3.
To stay within the CMMI framework while minimizing assessment time and cost, some small companies run a class B or C assessment 11 instead of a SCAMPI (Standard CMMI Appraisal Method for Process Improvement) class A assessment ( www.sei.cmu.edu/ cmmi/appraisals/appraisals.html). Class B and C appraisals are scaled-down assessments that focus, for example, only on a single project or process area and don't produce any formal ratings.
In this context, the article "Adept: A Unified Assessment Method for Small Software Companies" by Fergal Mc Caffery, Philip S. Taylor, and Gerry Coleman presents a cohesive model covering both plan-driven and agile development approaches. It enables a focused, tailored improvement path driven by the company's operational context and business goals.
When developing products, companies must deal with the difficulties of eliciting, managing, and prioritizing requirements. They must select the most important functional and nonfunctional requirements from what might be a very large set of requirements. Project managers face questions such as
• What requirements give the customer the greatest benefit?
• Can we exclude any requirements from our product without sacrificing market share?
• What requirements should we include in initial and subsequent versions of our product?
They must prioritize the requirements to ensure that they develop the correct product for the customer, but they must choose them in such a way so that they can develop them incrementally if needed. Several authors proposed solutions to prioritization, most of which let groups of stakeholders determine, through a structured method, each requirement's "value." Such techniques aim to eliminate the development team's personal preferences from the decision-making process and to ensure that the team hears the customer's voice and includes it in requirements prioritization. These techniques include Quality Function Deployment 12,13 and the Analytic Hierarchical Process. 14,15 Joachim Karlsson, Claes Wohlin, and Björn Regnell evaluated methods for prioritizing software requirements. 16
You might argue that in relatively small projects, we don't need structured techniques—so, what interest can they hold for small software organizations? However, in this issue, Jim Azar, Randy K. Smith, and David Cordes present a value-oriented prioritization framework based on Karl Wiegers' approach. The authors' case study demonstrates how a very small organization implemented the process successfully and how it contributed to that organization's growth.
When a small organization starts to grow, so does its need to maintain versions of its software. Configuration management ensures that the organization manages its versions of software products and their associated artifacts. Mary Beth Chrissis, Mike Konrad, and Sandy Shrum point out that "for some work products it may be appropriate to maintain version control (i.e. the version of the work product in use at a given time, past or present, is known and changes are incorporated in a controlled manner)." 17 Small organizations might see implementing version control as an investment with little return: they can't do any productive development during initial implementation. However, some companies lose a lot of time by not implementing it—for instance, when they have to retrieve old software or remove changes when maintenance issues arise. In fact, configuration management, the process area in which version control falls, is a CMMI Level 1 process, indicating its importance in supporting other processes in the organization.
But how can a small organization implement manageable version control? The case study presented by Jan Ploski, Wilhelm Hasselbring, Jochen Rehwinkel, and Stefan Schwierz in their article "Introducing Version Control to Database-Centric Applications in a Small Enterprise" deals with this topic. Having successfully implemented the system, they now plan to automate it. In their conclusion, they mention another issue that interests us: they point out the importance of small organizations linking up with local universities to benefit from research carried out there.
Software tools and environments
Today, developers can't carry out software engineering tasks without reasonable tool support. 18 SE tools and environments aim to assist in software development and maintenance or even to automate repetitive, well-defined actions. A large number and variety of such tools and environments exist, providing either support for individual tasks or integrated support in software engineering environments that encompass the complete life cycle. For example, they might include tools for requirements development and management, design, software construction, testing, documentation, configuration management, reengineering, reuse, and project management and measurement.
A step ahead are process-centered software engineering environments (PSEEs), which explicitly incorporate information on software processes and guide and monitor the user according to a defined process model. They can provide flexible support by considering the defined process itself as a changeable parameter. However, most PSEEs today are academic prototypes, which researchers have applied thus far only in a few industrial settings.
On the other side, industry has recognized that integrated environments that you can't adapt to a company-specific process don't enhance productivity or software quality. 19 And, in parallel, the software process itself has gained more attention. So, companies are increasingly choosing or even developing specific tools and working on their integration or adaptation to support a company-specific software process.
Rather than focusing on automation, PSEEs should facilitate the execution of such complex processes, often even in distributed environments. One current trend supports cooperative work and communication, so multiple users can work together in a controlled way. 20
Today, lots of SE tools, both commercial and open source ones, either provide specific support or operate in an integrated manner. However, in general, we observed a lack of systematic evaluations or comparisons. A difficulty here might be the large number of tools and their high rate of change, which makes concrete, up-to-date evaluations difficult.
Information on SE tools or their usage specifically in small organizations is even more scarce. In this context, the article "An Open Source Approach to Developing Software in a Small Organization" by Ken Martin and Bill Hoffman presents their long-term experience in integrating tool support in a small software company. They focus principally on communication, revision control, build and release management, and testing.
The Point/Counterpoint debate
The question we chose for the point-counterpoint discussion is this: can small and large organizations apply the same software engineering techniques, given their specific characteristics and limitations? Larry Lumsden, chief technical officer of Cúram Software in Ireland, argues yes, and Wolfgang Strigel, president of QA Labs in Canada, argues no. Both authors have considerable experience dealing with small software organizations' software engineering challenges, so their differing views are worth reading.
What will the future bring? As this special issue shows, developers around the world are working on adapting software engineering solutions for small organizations, and the number of experience reports on such applications is increasing. Customized approaches will likely become more available. Furthermore, interest in research in small software companies seems to be increasing, so researchers' skills and experience are becoming more available in those settings. These factors will contribute to supporting small organizations as they apply software engineering solutions and help them operate more effectively and efficiently.
Ita Richardson is a senior lecturer at the University of Limerick and head of operations at Lero—the Irish Software Engineering Research Centre. She's also project leader on the Science Foundation Ireland-funded Global Software Development for Small to Medium Sized Enterprises project. Her research interests are software process improvement and global software development, particularly in small companies. She received her PhD in software engineering from the University of Limerick. She's a member of the IEEE Computer Society, the Irish Computer Society, and the British Computer Society and is a chartered engineer. She's on the editorial board of Software Process Improvement and Practice. Contact her at Lero—the Irish Software Eng. Research Ctr., Dept. of Computer Science & Information Systems, Univ. of Limerick, Limerick, Ireland; email@example.com.
Christiane Gresse von Wangenheim is a professor at the Universidade do Vale do Itajaí (UNIVALI) and a consultant at Incremental Tecnologia. Her research interests are in software process improvement, focusing on small companies. She's also a project management professional and assessor of the Brazilian Process Improvement Model MPS.BR. She received her PhD in production engineering from the Federal University of Santa Catarina and her PhD in computer science from the University of Kaiserslautern. She's a member of the IEEE Computer Society, the Project Management Institute, and the Working Group ISO/IEC JTC1/SC7/WG24—SE Life-Cycle Profiles for Very Small Enterprises. Contact her at UNIVALI, Rod. SC 407, Km 04, 88122-000 São José/SC, Brazil; firstname.lastname@example.org.