- Period (Currency): Restricted. The tradition of constructing and using Springfield enclosures appears from present evidence to have spanned 150-300 years, broadly the 10th to 8th centuries BC. Individual sites appear to have been used throughout most of this period.
- Rarity: Very rare. Only about eight 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 a single ditch and internal bank, and those with double ditches and banks.
- Period (Representativity): Very high. Springfield enclosures are one of a very 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.
Assigning scores to these criteria following the scheme set out in the Monuments Evaluation Manual, Springfield 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 these sites. In finnding examples for preservation however, it may be noted that many of the known sites were destroyed at the time they cam e to attention. Thus the number of surviving examples is very small.