text: Synthesis Depending on the kind of product being designed, the latter two sections are most often revisited (e.g. depending on how often the design needs revision, to improve it or to better fit the criteria). This is a continuous loop, where feedback is the main component. Koberg and Bagnell offer more specifics on the process: In their model, "analysis" consists of two stages, "concept" is only one stage, and "synthesis" encompasses the other four. (These terms notably vary in usage in different design frameworks. Here, they are used in the way they're used by Koberg and Bagnell.)
  Analysis
  Accept Situation: Here, the designers decide on committing to the project and finding a solution to the problem. They pool their resources into figuring out how to solve the task most efficiently.
  Analyze: In this stage, everyone in the team begins research. They gather general and specific materials which will help to figure out how their problem might be solved. This can range from statistics, questionnaires, and articles, among many other sources.
  Concept
  Define: This is where the key issue of the matter is defined. The conditions of the problem become objectives, and restraints on the situation become the parameters within which the new design must be constructed.
  Synthesis
  Ideate: The designers here brainstorm different ideas, solutions for their design problem.  The ideal brainstorming session does not involve any bias or judgment, but instead builds on original ideas.
  Select: By now, the designers have narrowed down their ideas to a select few, which can be guaranteed successes and from there they can outline their plan to make the product.
  Implement: This is where the prototypes are built, the plan outlined in the previous step is realized and the product starts to become an actual object.