The Scalable Preservation Environments project has released the Report on Decision Factors and Their Influence on Planning.
Here's an excerpt:
This report sheds light on the actual decision criteria and influence factors to be considered when choosing digital preservation actions. It is based on an extensive evaluation of case studies on preservation planning for a range of different types of objects with partners from different institutional backgrounds. We analyse objective trees from a number of real-world decision making instances and classify the objectives and decision criteria. We analyse the measurability and required information for decision criteria, and the objectives and decision factors contained in objective trees. We further discuss the mapping of different quality models and map decision criteria to standardised models for decision factors in the areas of software quality, format assessment, and object properties.