Timeliness

               Timeliness is the ability of a software system to be released when or before its users want it.Timeliness is one of the great frustrations of our industry. A great software product that appears too late might miss its target altogether. This is true in other industries too, but few evolve as quickly as software.Method promotes a common design style and standardized module and system interfaces, which help produce systems that will work together.

                        Timeliness is still, for large projects, an uncommon phenomenon. When Microsoft announced that the latest release of its principal operating system, several years in the making, would be delivered one month early, the event was newsworthy enough to make the frontpage headline of ComputerWorld.O-O techniques enable those who master them to produce software faster and at less cost; they facilitate addition of functions, and may even of themselves suggest new functions to add.

                 The contribution of O-O tools to modern interactive systems and especially their user interfaces is well known, to the point that it sometimes obscures other aspects.Although the extra power or object-oriented techniques at first appears to carry a price, relying on professional-quality reusable components can often yield considerable performance improvements.Because of this closeness of correctness and robustness issues, it is convenient to use a more general term, reliability, to cover both factors.

                   With its emphasis on abstraction and information hiding, object technology encourages designers to distinguish between specification and implementation properties, facilitating porting efforts. The techniques of polymorphism and dynamic binding will even make it possible to write systems that automatically adapt to various components of the hardware software machine, for example different window systems or different database management systems.