In recent work at US Navy Naval Surface Warfare Centre NSWC-SSES Advanced Machinery Systems Integration Branch (Philadelphia), an experienced Naval engineer was working on a minor order: to move a chilled water cooler from beneath deck to above deck in a mess barge.  
Whilst this might sound like a fairly straight forward task, he was struggling at having to understand the numerous documents on the individual systems involved; how pipes and machines and spaces are all inter-dependent in the tightly crowded barge; and where every system has been sized, engineered, and positioned for the current configuration.  
The "data forensics" undertaken which was required was affecting a seemingly innocuous task and was, in fact, proving extremely daunting, and allowed much less time for the actual “valuable” engineering work required to make the design change.