The Free On-line Dictionary of Computing (30 December 2018):

Manufacturer Resource Planning
MRP II

    (MRP II) A system based on MRP which allows
   manufacturers to optimise materials, procurement,
   manufacturing processes, etc., and provide financial and
   planning reports.

   In the late 1970s and early 1980s, manufacturers integrated
   MRP and other manufacturing and business functions.  This
   renaissance is commonly known as Manufacturing Resource
   Planning (MRP II).  According to the American Production and
   Inventory Control Society, Inc. (APICS), MRP II is a method
   for the effective planning of all resources of a manufacturing
   company.  Ideally, it addresses operational planning in units,
   financial planning in dollars, and has a simulation capability
   to answer "what if" questions.  It includes business planning,
   sales and operations planning, production scheduling, material
   requirements planning (MRP), capacity requirements planning,
   and the execution support systems for capacity and material.
   Output from these systems is integrated with financial reports
   such as the business plan, purchase commitment report,
   shipping budget, and inventory projections in dollars.
   Manufacturing resource planning is a direct outgrowth and
   extension of closed-loop MRP.

   See also Enterprise Resource Planning, SAP R/2, R/3, and
   Baan.

   (1999-02-16)