Software reliability allocation based on structure, utility, price, and cost

A software reliability allocation model is developed. This model determines how reliable software modules and programs must be in order to maximize the user´s utility, while taking into account the financial and technical constraints of the system. The model is shown to provide a unified approach in which the user´s requirements and preferences are formally integrated with the technical structure of the software and its module and program reliabilities. The model determines reliability goals at the planning and design stages of the software project, making reliability a singular measure for performance evaluation and project control. An example for the application of the model is provided