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Aggregate Planning
to give management an idea of what quantity of materials to be procured and when
Disaggregation
analytic disassembly which have been aggregated (lumped together)
Master Production Schedule (MPS)
a timetable that specifies what is to be made and when
Rough-cut Capacity Planning
verifies sufficient capacity available to meet requirements for MPS
time fences
points in time that separate phases of a master schedule planning horizon
Inputs
the resourcesâsuch as labor, money, materials, and energyâthat are converted through a process
beginning inventory, forecast, customer orders
Outputs
projected inventory, MPS, uncommitted inventory
Available to Promise (ATP)
planned production not already committed to a customer
inventory available for request product
uncommitted inventory
customer service feature
Dependent Demand
demand for items that are subassemblies or component parts to be used in the production of finished goods
Material Requirements Planning (MRP)
a planning system that schedules the precise quantity of materials needed to make the product
Master Schedule
determines supply quantity required to meet demand.
cumulative lead time
The sum of the lead times that sequential phases of a process require, from ordering of parts or raw materials to completion of final assembly.
Bill of Materials (BOM)
One of the three primary inputs of MRP; a listing of all of the raw materials, parts, subassemblies, and assemblies needed to produce one unit of a product.
Inventory Records
identify the type and number of products on hand for sale
lot sizing
the determination of how frequently and in what quantity to order inventory
Backflushing
a technique that automatically records the goods issue when the order is confirmed
ERP (Enterprise Resource Planning)
Integration of financial, manufacturing, and human resources in a single database.
8 functions of inventory
1. Anticipate customer demand
2. Smooth seasonal requirements
3. Decouple operations with buffers
4. Protect against stock-outs
5. Cycle stock - lot sizing
6. Hedge against price increases
7. Permit operations - pipeline
8. Quantity discounts
Inventory Turnover
cost of goods sold/average inventory
Periodic System
Physical count of items in inventory made at periodic intervals
Perpetual System
Check accuracy of inventory records.
Determine amount of inventory lost due to wasted raw materials, shoplifting, or employee theft
two-bin system
two containers of inventory; reorder when the first is empty
lead time
The amount of time between the recognition that an order needs to be placed and the arrival of the needed merchandise at the seller's store, ready for sale.
purchase cost
The cost to actually purchase the inventory items. This cost is relevant in determining the order quantity only when the purchase cost is variable
holding costs
the costs of holding or "carrying" inventory over time
ordering costs
costs of ordering and receiving inventory
setup cost
the cost to prepare a machine or process for production and administrative expenses
shortage costs
Costs resulting when demand exceeds the supply of inventory; often unrealized profit per unit
A-B-C Approach
Classifying inventory according to some measure of importance, and allocating control efforts accordingly
cycle counting
a physical count of items in inventory
Reorder Point (ROP)
when the quantity on hand of an item drops to this amount, the item is reordered
Safety Stock
quantity held in excess of expected demand to cover variability in demand
Economic Order Quantity (EOQ)
the optimal order size to minimize the sum of ordering, carrying, and stockout costs
Kanban
a ticket-based JIT system that indicates when to reorder inventory (signal)
Kaizen
continuous improvement
Ultimate goal
balanced and rapid flow
Supporting goals
1. Eliminate disruptions
2. Make the system flexible
3. Eliminate waste, especially excess inventory
Seven Wastes
1. Unnecessary Inventory
2. Over-production
3. Waiting time
4. Unnecessary transporting
5. Processing waste
6. Inefficient work methods
7. Product defects, rework
small lot sizes (benefits)
1. reduces inventory
2. Less rework
3. Less storage space
4. Problems are more apparent
5. Increases product variability
6. easier to balance operations
Single-minute exchange of die (SMED)
The concept of setup times of less than 10 minutes, developed by Shigeo Shingo in 1970 at Toyota.
internal setup
Takt Time
cycle time needed to match the rate of production to the rate of sales or consumption
Push System
work is pushed to the next station as it is completed
Pull System
a workstation pulls output from the preceding station as it is needed
Supplier Tiers
multi level suppliers, one company will make a part, that goes into production at another company, which then sends a larger part out to another company to add to it
housekeeping
Maintaining a workplace that is clean and free of unnecessary materials
5 S's
1. Sort
2. Straighten
3. Sweep
4. Standardize
5. Self-discipline
Value stream Mapping
method for analyzing the current state and designing a future state
Supply Chain Management
(value chain)
involves the movement and storage of raw materials, of work-in-process inventory, and of finished goods from point of origin to point of consumption.
Logistics
the management of the details of an operation
Purchasing Cycle
Steps that begin with request to buy
End with notification of shipment received
in satisfactory condition
1.Receive requisition
2.Select supplier
3.Place order
4.Monitor orders
5.Receive orders
centralized purchasing
purchasing department located at the firm's corporate office makes all the purchasing decisions
Decentralized Purchasing
individual departments or separate locations handle their own purchasing requirements
vendor analysis
a formal rating of suppliers on all relevant areas of performance
certification
relationship
partnership
strategic partnering
Two or more organizations agree to collaborate so that each may realize a strategic benefit
inventory velocity
the speed at which goods move through a supply chain
bullwhip effect
occurs when distorted product-demand information ripples from one partner to the next throughout the supply chain
(Inventory oscillations become progressively
larger looking backward through the supply chain)
vendor managed inventory
an approach for improving supply chain efficiency in which the manufacturer is responsible for maintaining the retailer's inventory levels in each of its stores
order fullfillment
the steps involved in receiving, processing and delivering orders to end customers
Traffic Management
overseeing the shipment of incoming and outgoing goods
Radio Frequency Identification (RFID)
uses electronic tags and labels to identify objects wirelessly over short distances
Third Party Logistics (3PL)
an independent logistics provider that performs any or all of the functions required to get a client's product to market
Strategic Sourcing
managing the firm's external resources to support firm's long term goals
Information velocity
The rate at which information is
communicated in both directions
supply chain visibility
the ability to view all areas up and down the supply chain in real time
Fill rate
the percentage of demand (back orders) filled by the stock on hand
Cross-docking
avoiding the placement of materials or supplies in storage by processing them as they are received for shipment
Projects
Unique, one-time operations designed to accomplish
a specific set of objectives in a limited time frame
Work Breakdown Structure
defines the hierarchy of project tasks, subtasks, and work packages
PERT network
a flowchart diagram showing the sequence of activities needed to complete a project and the time or cost associated with each
CPM
Critical path method, for planning and coordinating large projects.
Network (precedence) diagram
diagram of project activities that shows sequential relationships by use of arrows and nodes
critical path
in a PERT network, the sequence of tasks that takes the longest time to complete
Critical Activity
Any activity on the critical path
slack
the amount of time that a task in a project network can be delayed without causing a delay
crash
technique to use when fast tracking has not saved enough time on the schedule.
resources are added to the project for the least cost possible
Risk Management
All efforts designed to preserve assets and earning power associated with a business.