Dividing the application definition from the execution

Current computing practice requires great effort to produce an application with a reliable, distributed, heterogeneous, adaptive, dynamic, real time, parallel or secure execution. One exception is a bag-of-tasks application. Examples of such applications include the simulation of independent trials, the processing of independent media frames, and the evaluation of independent candidate solutions. In many real-world projects, an external system provides such an application with a transparent execution. Dividing application definition from application execution greatly reduces the effort to produce the application. The article has several aims. Most specifically, it explains how to produce a bag-of-tasks application with less effort. Most generally, it points out that we can treat many other applications like a bag-of-tasks application and so produce them with less effort.