HTML based drawing management. Use standard Open Source software (JAVA, PERL) available for free with unlimited use.

Web GIS Drawing management. Use a base map of your facilities as the ineterface to your drawings. Our favourite.

Excel/Access System. Do you have licensed copies of Excel or Access for all users in your organization? Then this may be for you.

Vendor Based drawing retrieval system
For thoose who prefer an off the shelf product.

Still can't decide - then why not read our article in Municpal World magazine on the different drawing management solutions. A good fact based article. Discusses the pro and cons of three diffenent techniques and one do it yourself approach.