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54 Cards in this Set

  • Front
  • Back
Priority
What is needed, how many and when; Capacity is the capability to produce goods and services. In the long run, they must be in balance
Material Requirements Plan (MRP)
A plan for production and purchase of items in the master production schedule. Purchase and Production Activity control use the MRP for controlling raw materials.
Production Activity Control and Purchasing
represent the implementation of the plan. Purchasing obtains material per the MRP and production carries out the tasks in the MRP
Sales and Operations Planning
is derived from the Strategic Business Plan and is made up of a Marketing Plan that links to the Production Planand a Detailed Sales Plan that links to the master Production Schedule.
Strategic Business Plan
1) marketing determines product & pricing 2) Finance finds funds 3) Production meets needs through machinery & labor 4) Engineering is responsible for design. Reviewed every 6 months to a year
Master Production Schedule (MPS)
for production of individual items. The planning horizon is 3-18 months out. Master scheduling is the process of making an MPS. The plans are changed weekly or monthly
Manufacturing Resource Planning (MRP II)
is the fully integrated planning and control system. It coordinates between marketing and production. It includes the sales and operations plan, the sales plan, master schedule, material requirements plan, purchasing, production activity control and performance measures
Level production
(total forecast + back orders + ending inventory – opening inventory) / # of periods
Resource bill
shows the critical resources needed to make one average unit in the product group. This is used for resource planning. You need to determine the materials (# of units * # of material required) and labor (# of units * # of hours) needed to make the plan in standard hours
Master production schedule (MPS)
1) links production planning to what will be built 2) calculates capacity and resources needed 3) drives the materials requirements plan 4) drives priorities for manufacturing
To build the master production schedule (MPS) you need the following information
1. the production plan
2. forecasts for individual end items
3. actual orders received from customers and for stock replenishment
4. inventory levels for individual end items
5. capacity constraints
Objectives of MPS
1) maintain finished good inventory levels 2) make the best use of labor, materials & equipment 3) maintain inventory investment (WIP) at the required levels
• Develop a preliminary MPS, check MPS against capacity, resolve differences (this is called rough cut capacity planning)
Rough cut capacity planning
checks whether resources are available to support the preliminary master production schedule. Plan on a single product, not a group, and use the resource bill
• For make to stock, the MPS is a schedule of finished goods items, for make to order the MPS is a schedule of actual customer orders, for assemble to order, go to the base order
Final Assembly Schedule (FAS)
schedule of what will be produced
Available to Promise (ATP)
ATP = scheduled receipts + beginning inventory = actual orders scheduled
Frozen Zone
capacity and materials are committed to specific orders, senior mgmt approval required for changes
Slushy Zone
capacity and material are committed to less extent. Tradeoffs must be met between marketing and manufacturing
Liquid Zone
any changes can be made to the MPS
Objectives of Materials Requirements Planning
1) determine requirements 2) keep priorities current
What does Material Requirements Planning (MRP) do?
drives Production Activity Control (PAC) and purchasing. MRP plans the release and receipt dates for orders. PAC and purchasing must plan and control the performance of orders to meet the due dates
Inputs to Material Requirements Planning System
1) master production schedule 2) inventory records 3) bills of materials
Bill of Material (BOM)
“a listing of all the subassemblies, intermediaries, parts and raw materials that go into making the parent assembly showing the quantities of each required to make an assembly”
Multilevel bills
formed as logical groupings of parts into subassemblies, based on the way the product is assembled (i.e. an auto has a frame, chassis, doors, windows and engine as subassemblies)
Where-used reports
Where-used reports give the same information as a bill of material, but gives the parents for a component. Wheels might be used on several models of cars
Pegging report
like a where used report but only shows parents for which there is an existing requirement (rather than all parents, even those with no current production)
Lead time
the amount of time needed to perform an operation – it includes order preparation, queuing, processing, moving receiving and inspecting
Exploding
the process of multiplying the requirements by the usage quantity and recording the appropriate requirements throughout the product tree
Offsetting
the process of placing the exploded requirements in their proper periods based on lead time
Releasing an order
authorization is given to purchasing to buy the necessary material or to manufacturing to make the component (check component availability first)
Low level code
the lowest level on which a part resides in all bills of material. Determined by starting at the lowest level of a bill of material and working up to the par
Capacity
The amount of work that can be done in a specific time span.
Capacity required
the capacity of a system or resource needed to produce a desired output in a given time period
Load
the amount of released and planned work assigned to a facility for a particular time period
Capacity management
responsible for determining the capacity needed to achieve the priority plans. “The function of establishing, measuring, monitoring, and adjusting limits or levels of capacity in order to execute all manufacturing schedules
Capacity control
the process of monitoring production output, comparing it with capacity plans, and taking corrective actions when needed
Resource Planning
involves long-range capacity resource requirements and is directly linked to production planning. If the resource plan cannot be devised to meet the production plan, then the production plan has to be changed
Open order file
a record of all the active shop orders
Planned order releases
determined by the computer’s MRP logic based upon the gross requirements for a particular part
Routing
the path that work follows from work center to work center as it is completed
work center
composed of a number of machines or workers capable of doing the same work
work center file
contains information on the capacity and move, wait and queue ties associated with the center
move time
the time taken to move material from one workstation to another
wait time
the time a job is at a work center after completion and before being moved
queue time
the time a job waits at a work center before being handled
Lead time
the sum of queue, setup, run, wait and move times.
Demonstrated capacity
figured from historical data (and is the average, not maximum output)
Calculated or rated capacity
based on available time, utilization, and efficiency
Utilization
hours actually worked / available hours * 100%
Efficiency
actual rate of production / standard rate of production * 100%
Rated capacity
available time * utilization * efficiency
Load
the sum of the required times for all the planned and actual orders to be run on the work center in a specified period.
Calculation of load
1) determine standard hours of operation time for each planned and released order for each work center by time period 2) add all the standard hours together
Work center load report
shows 1) over capacity 2) under capacity work centers
Scheduling
“timetable for planned occurrences”