A model-oriented programming method for computer-based software system development and management. The method includes (a) obtaining the program problem specifications, (b) building a model of the software system, (c) segmenting the model into model segments, wherein each of the model segments is assigned to a programmer, (d) writing a code for each of the model segments, wherein the code implements the assigned model segment, (e) running a model-driven dry-run and upon detection of a model error fixing the error and proceeding with step (c), (f) debugging the code by each of the programmers and upon detection of a model error fixing the error and proceeding with step (c), (g) integrating the code corresponding to each of the model segments into a computer-based software system, and upon detection of a model error fixing the error and proceeding with step (c), and (h) delivering the integrated computer-based software to the client.