Test 1 Flashcards
The goal cannot conflict with:
The employees and customers which have necessary conditions
Customer and Employees
Customer: product must be competetive
Employee: Need to be engaged
Measuring the Goal -CEO
Net Profit
Return on Investment
Measuring the goal: middle management level, departments
Production, sales, Purchasing, Logistics, Quality
Systems view: high level
Supply->Production->market
What would happen if we pushed each station to work at its maximum rate?
Huge buildup of inventory or work in progress while still outputting same amount -suboptimised system.
Performance measure
Cost/unit
Goal is impacted by
Inventory, Revenue, Costs:
Revenue down = bad
Costs up = bad
Inventory up = bad
Throughput accounting -alternative measure
Allows us to know if production improvements will support the goal
Throughput
Sales - Raw Materials (Truly Variable costs)
The rate at which the system generates money (eg sales)
Inventory/Investment
The money the system invests in things the system intends to sell (stock and equipment)
Operating Expense
Money the system spends in turning investment into throughput dollars (lighting, Labour)
How do we decide if a change within the production system is good
Change that causes
Throughput to increase
Inventory to decrease
Operating Expense to decrease
Suboptimisation
Any improvement in the a in the chain is an improvement on the whole system -AVOID
Constraints
People, process, policy, equipment, storage, market
Constraints:
Physical: -capacity -market -supply Policy: -formal -informal -behavioural
A 5 step process of on-going improvement for physical constraints
Identify -identify constraint
Exploit -make the most of what we have. squeeze as much of the theoretical capacity that is available from constraint
Subordinate: need support from rest or organisation
Elevate: seeks to obtain more
Inertia: If constraint changes -go back
A 3 step process of on going improvment for policy constraints
What to change
What to change to
How to cause the change
Lead time
The time it takes to produce an order for a customer is the lead time and can be divided into Setup Time, Process time, Queue time and Wait time.
Set up time
When a part is waiting for a process, such as a machine being prepared to work on that part, this is called Setup Time.
Process Time.
The time that a part spends being worked on by that machine is Process Time.
Queue Time
The time that a part spends in front of a machine or process that is currently working on another part, is called Queue Time.
Wait time
And finally when a part is waiting on another part to be completed in an assembly is called Wait Time.
Subordination
protect the systems constraints -buffer. Protect constraint ftom shortages