Incrementalism

Incrementalism is a method of working by adding to a project using many small changes instead of a few (extensively planned) large jumps. Logical incrementalism implies that the steps in the process are sensible. Logical Incrementalism focuses on "the Power-Behavioral Approach to planning rather than to the Formal Systems Planning Approach." In public policy, incrementalism refers to the method of change by which many small policy changes are enacted over time in order to create a larger broad based policy change. This was the theoretical policy of rationality developed by Lindblom to be seen as a middle way between the rational actor model and bounded rationality, as both long term goal driven policy rationality and satisficing were not seen as adequate.

Most people use incrementalism without ever needing a name for it because it is the natural and intuitive way to tackle everyday problems, such as making coffee or getting dressed. These actions normally don't require extensive planning and problems can be dealt with one at a time as they arise.

Even in processes that involve more extensive planning, incrementalism is often an important tactic for dealing reactively with small details. For example, one might plan a route for a driving trip on a map, but one would not typically plan in advance where to change lanes or how long to stop at each streetlight.

The Political Scientist, Charles E. Lindblom, developed Incrementalism in the mid 1950s. “The Science of Muddling Through” (1959), was an essay Lindblom wrote to help policymakers understand why they needed to consider a different approach when making policy changes. The goal for the new perspective of Incrementalism was for policy makers to avoid making changes before they really engaged and rationally thought through the issue.

In large projects following some type of strategic planning, there is normally a need to allocate time to plan the project in order to avoid "fire fighting", in other words the avoidance of time delaying issues. In contrast to other systems of planning such as top down, bottom up, and so on, incrementalism states that you should concentrate on dealing with the immediate problems as they arrive and avoid trying to create an overall strategic plan. This means muddling through the issues at hand based on importance.

...
Wikipedia