Tag Archives: agile

Change is Natural – “Embrace Change”

Kent Beck’s book “Extreme Programming Explained : Embrace Change” provides a good introduction to how software development can embrace the constant change that affects our world. Some of the practices he introduces are very software-specific. However, the overall basic message is sound and provides a foundational principle for all agile work. (By the way, the book is excellent.)

Change really does occur everywhere. Change is constant. A google search for “embrace change” or “change is constant” will both turn up an incredible variety of articles, papers, discussions, books and viewpoints that all affirm the constant nature of change and the need to embrace it.

Nevertheless, it is sometimes difficult to accomodate change when we also have a legitimate and deep desire to know what is coming next.

For many teams, the environment in which they work is constantly changing. This change can be caused by competition between organizations, scientific or technological advances, fads and cultural shifts, major events in people’s personal lives or even just a change of opinion with a stakeholder. Any change, even small change, can invalidate a planned course of action. However, goals (as distinct from plans) are more stable and often survive even major environmental changes. Therefore, rather than trying to plan the future, an agile team can focus on being able to respond to change while still reaching a goal.

Nevertheless, a team needs some sense of what it will do in the near future. A team can work with a “horizon of predictability”. This is the distance into the future which a team can be reasonably certain that plans will be stable. Depending on the environment, this may be as little as a few minutes, or as long as a month. It is rarely longer. The horizon of predictability is not a precise demarcation, rather, expect change with a probability based on the horizon of predictability. Then, plan to respond to change. Be detached from the concrete details of a plan, particularly if they occur outside the horizon of predictability.

Agile Work - Horizon of Predictability

Responding to change requires a major mental shift for many people that is difficult and takes time and environmental support. People are often penalized socially or formally for being flexible or adaptable. This quality can appear to be “wishy-washy”, uncertain, indecisive, uncommitted or even rebellious.

The terms “agility” or “agile work” refer to this principle of embracing constant change since it is the most visible of the principles. However, the ability to respond to change relies on the establishment of agile work disciplines and practices.


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Plan Methods Oppose Agile Work Axioms

Plan driven methodologies which attempt to mechanize the process of doing work are in opposition to the three Agile Work Principles.

We are Creators
A plan methodology attempts to define intermediate and end work products independently of the input and effort of those who perform the work of creating the work products. This disenfranchises people from their work and leads to low morale. It also establishes a heirarchy of value for the people working on an effort where those who create the plans are perceived as more important or valuable than those who execute on the plans.

Change is Natural
This principle is usually acknowledged, but is usually described as a “problem” to be dealt with rather than as a basic principle to be fully embraced. A plan methodology has “change control” or “change management” and “risk management” and puts the whole notion of change in a negative light. This approach also disenfranchises people because they are constantly placed in opposition to reality.

Reality is Perceived
Plans attempt to legislate reality. “Thus and so must the project go” results in a constant struggle between the plan and peoples’ perception of reality. Plans marginalize the importance of perception on the belief that reality can be objectively understood. If reality can be objectively understood, then it can be mechanistically manipulated. Thus results can be pre-determined without regard for the perception of those results.

PlanVsAgile


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Backlogs in an Organization – Levels of Queues

Queues of work form at three types of levels in an agile organization.

At the largest level is the project portfolio. The queue for this level contains all the projects that are not yet being actively worked upon by project teams.

At the intermediate level is the backlog of project functionality. The queue for this level contains packages of business function or infrastructure components necessary to implement business function. These packages are selected by a project team to fit into a single iteration.

The packages in turn are also elements in a queue. This smallest level of queue contains individual tasks required to implement all the business function and infrastructure that make up a selected package of work. The team members select tasks off this queue based on priority and dependencies.

Queue Levels in an Organization

In many agile methods, the queue management approach is fairly explicit at the intermediate and small levels. However, very little is said about the largest level. Some organizations have solved this by limiting the size of projects:

To be successful, high-tech CIOs recommend biting off projects in small chunks…. Gregoire notes that Dell is growing so fast that at the end of an 18-month project, the company would be significantly different from when it began. “A project has to take less than six months [to complete]. That’s the only way we can make sure [it stays] with the business,” he says. (http://www.cio.com/archive/120198/tech.html)


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