Usability includes methods of measuring usability, such as needs analysis and the study of the principles behind an object's perceived efficiency or elegance.
Crowne Burial Vault. The burial vault is a waterproof container designed for earth burial. Made in America and constructed of high technology polymer, it is strong enough to withstand the weight of earth-moving and cemetery maintenance equipment.
There are two main benefits of above ground lawn crypt burial: Lawn crypts allow two people to be memorialized together, and the space always remains clean and dry. Crypts also feature a water drainage system directly below the area to provide added protection from weather.