ANSI/ISA S88 design concepts make validation easier. A modular S88 design will allow one to validate (and revalidate) procedures and equipment separately. With well-written equipment phases, for example, once Phase A is validated, modifying other phases will not upset Phase A's validated state.
Also, validating a recipe procedure is easier once the phases are validated. Since recipe procedure code is decoupled from equipment phase code, the need to revalidate a recipe procedure does not necessarily require that all phases be revalidated. Theoretically, one can validate new additions to a process or revalidate changes to a process faster. Moreover, the S88 modular design approach helps minimize the risk that a change to one part of the process will affect another. Validating new additions to a process or revalidating changes to a process faster, results in the product making it to the market quicker.