SCRUM Methodology

The system development process is complicated and complex. Therefore maximum flexibility and appropriate control is required. Evolution favors those that operate with maximum exposure to environmental change and have optimised for flexible adaptation to change. Evolution deselects those who have insulated themselves from environmental change and have minimized chaos and complexity in their environment.
An approach is needed that enables development teams to operate adaptively within a complex environment using imprecise processes. Complex system development occurs under rapidly changing circumstances. Producing orderly systems under chaotic circumstances requires maximum flexibility. The closer the development team operates to the edge of chaos, while still maintaining order, the more competitive and useful the resulting system will be. Langton has modeled this effect in computer simulations13 and his work has provided this as a fundamental theorem in complexity theory.
Methodology may well be the most important factor in determining the probability of success. Methodologies that encourage and support flexibility have a high degree of tolerance for changes in other variables. With these methodologies, the development process is regarded as unpredictable at the onset, and control mechanisms are put in place to manage the unpredictability.
If we graph the relationship between environmental complexity and probability of success with a flexible methodology that incorporates controls and risk management, the tolerance for change is more durable.