1 the fine, soft, shiny fiber produced by silkworms to form their cocoons. 2  thread or fabric made from this fiber. 3  a garment or other article made of this fabric. 4  a distinctive silk uniform, as of a jockey.  the silk gown worn by a King's (or Queen's) Counsel in British law courts.
A prescriptive specification is one that includes clauses for means and methods of construction and composition of the concrete mix rather than defining performance requirements.he general concept of how a performance-based specification for concrete would work is as follows: There would be a qualification/certification system that establishes the requirements for a quality control management system, qualification of personnel and requirements for concrete production facilities.
Requirements are the users' description of what the finished product, in their eyes, should do. Specification is the technical description of the solution in general, covering the requirements and much more-e.g. cost, technicalities, problems, etc.equirements document what is needed-they shouldn't specify the how, but the what. Specifications document how to achieve the requirements-they should specify the how. In many places these documents are not separate and are used interchangeably.