Stories, Capabilities, Services and Contracts

June 25th, 2008  |  Published in Agile, Behaviour-Driven Development, Consumer-Driven Contracts, SOA by Ian Robinson  |  1 Comment

Today I want to introduce a bare-bones model to help guide the creation of business, architectural and technology artefacts in an agile and iterative manner over the course of an SOA initiative:

  • Stories – in the form of Behaviour-Driven Development exemplars – describe goals and desired outcomes;
  • Capabilities encapsulate the resources and abilities an organisation needs to satisfy those goals;
  • Services host capabilities;
  • Contracts – particularly consumer-driven contracts – assert the interactions between services.

We iterate over this model many times in the course of an engagement, emphasising different parts as we go. We concentrate on organisation-level stories and capabilities when establishing an organisation-wide context, then project-level stories, capabilities and services whilst planning projects and delivery streams, and then release- and iteration-level artefacts during specific instances of delivery.

Such an approach represents a “thin-slice” way to:

  • establish context, business goals and consensus amongst stakeholders;
  • create a long-term vision that joins up the business, architectural and technology views of an SOA initiative;
  • describe and challenge an organisation’s goals and the benefits attached to those goals;
  • describe the capabilities needed to meet those goals;
  • identify the quality-of-service expectations the business has of those capabilities;
  • identify services and assign capabilities to services;
  • describe and test the externally visible interactions between services;
  • identify, plan and develop slices of service functionality that deliver business benefits early and often.

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  1. Stories and Capabilities :: iansrobinson.com says:

    October 28th, 2008 at 9:15 am (#)

    […] written briefly in the past about using stories and capabilities to create a business-meaningful model of an organisation. When I pair stories and capabilities, I say that stories describe strategic organisational goals; […]