General cases involve problems that recur in astronomical data reduction, such as calibration.
Derived cases are specific cases that are made up of one or more components of general problems.
CDCI problems are a specific form of the derived case where the problem can be represented as a collection of general EP problems with a significant fraction of time spent in the collection and comparison of the distributed results in order to direct additional iterations. CDCI problems are among the most computationally intensive. Spectral line image construction and deconvolution. Spectral line processing, including imaging and deconvolution can be carried out easily in an embarrassingly parallel way. This is a common case and is easily implemented.