Some commercial providers may lack the experience and expertise for a competent initial case review and the final crucial interpretation of results.

Each forensic case has three stages: the initial review, when the scientist decides on tests to be undertaken, the laboratory examination/analysis and, finally, interpretation of results.

This presented new challenges in the conduct of experiments and the interpretation of results.

In addition, lab tests frequently include professional interpretation of results and recommendations.

A skillful choice of internal coordinates can make the interpretation of results straightforward.