- Period (Currency): Restricted. The tradition of building and using Martin Down enclosures appears from present evidence to have spanned approximately 150-300 years, broadly between the 10th and 8th centuries BC. Few individual sites are likely to have survived in use throughout this period, except in those cases where there is evidence for recutting and reconstruction.
- Rarity: Very rare. Only about 12 examples have been confirmed, although a larger number have been inferred on the basis of aerial survey.
- Diversity (Form): Medium. Although a number of criteria may be significant (eg. entrances), present evidence suggests a simple division between sites with ditches on all four sides, on three sides and on two sides.
- Period (Representativity): Very high. Martin Down enclosures are one of a restricted range of monument classes known for the later Bronze Age. They also provide contexts within which a wide range of data may be recovered. Most kinds of finds known from the period are present, and their association with other classes of monument makes them key sites for understanding the chronological relationships of the time.
Assigning scores to these criteria following the scheme set out in the Monuments Evaluation Manual, Martin Down enclosures yield a class importance value of 40. This places the class roughly two thirds of the way up the list of possible values (max= 64), reflecting the rarity and representativity of the class.