development

Highly regulated industries-avionics suppliers, medical device companies, and pharmaceutical manufacturers-must meet rigorous quality standards to ensure their products are not a danger to the general public. Although compliance has traditionally been achieved with heavyweight waterfall or V-model development methodologies, you can implement agile-or lean-agile-development practices that adhere to standards-based regulations while reducing the risk and improving software quality and reliability. Colin Doyle identifies the constraints that agile and lean-agile software development approaches must address: traceability to clearly defined requirements, formal risk analysis and mitigation, and separation of roles between development and validation.

Even though the code may have been written only five years ago, there it is-a sprawling unintelligible mess that nobody wants to touch. For most people and teams, this reality is a cause for fear and loathing-something we want to sweep under the rug. We can, however, choose to see “bad” code as a challenge to restructure and refactor into a maintainable design that serves the business for years to come. Although legacy code presents many constraints on design choices, it offers the opportunity for incremental improvement. Michael Feathers shows you how to practice design within the boundaries of what some see as unintelligible code and explains ways to make the improvement process manageable. See how you can escape the fear that holds you back from productive action. Find out how to start with what you have now and progress toward a structure that supports the work at hand and immediately adds value.

Open source is widespread and growing in many software development organizations. While there's no purchase cost, the code does come with license obligations. Understanding open source from an intellectual property perspective can help avoid downstream legal.

Users are the ultimate judge of the software we deliver because it is critical to their success and the success of their business. However, as a tester, do you really understand their tasks, skills, motivation, and work style? Are you delivering software that matches their needs and capabilities-or yours? Personas are a way to define user roles-imaginary characters-that represent common sets of characteristics of different users. David shares how his team at Microsoft defined and used one persona named “Ellen” to help them design, develop, and test the first version of a new product. David shares before Ellen and after Ellen examples of the product, showing how the product changed when Ellen joined the team. See examples of the robust test cases and acceptance scenarios they defined from unique insights that Ellen provided.