OM quiz 5
Water and the rocks analogy
hit the rock so you can find the problem and know how to fix it. dont order more inventory, try to order less
single channel vs multi channel
only one person you can get help with/only can wait for one person vs having multiple people available to help
what is a good example of this prop: Prop 7: The more valuable the service, the longer the customer will wait
people getting to college game day so early because it was so valuable
finite vs infinite line
"first 100 people" vs having 200 people wait in line and have 100 of them wait for nothing
how do you calculate critical ratio
(due date-current day) / work days remaining
in order to do MRP we need 3 things...
1. Bill of material. 2. Master production schedule of finished good. 3. Inventory information
do you know how to look at a product tree and an indented bill of material
2 sides per yoyo, 4 tires per car
CR stands for
Critical Ratio
Expects a known constant demand and MRP systems often deal with unknown and variable demand
EOQ
___ is a computer system that integrates application programs across functions in a company.
ERP
___ is a software package that lets us communicate through multiple functional platforms
ERP
EDD : ________ goes first
Earliest due date
this rule is also known as the fairness rule
FCFS (first come first serve)
some examples of queue disciplines are
FCFS- first come first serve (fairness rule) we need everything to be fair Cash or credit Fast passes
what are the 6 sequencing rules (different ways to calculate flow time)
FCFS: First come first serve (same as Forward Scheduling) EDD : Earliest due date goes first SPT: Shortest Processing time goes first LPT: Longest Processing time goes first STR: Slack Time Rule Remaining Operations CR: Critical Ratio
FCFS
First come first serve (same as Forward Scheduling)
the time between the release of a job to a work center until the job is finished
Flow time
forward scheduling vs backwards scheduling
Forward scheduling: "first come first serve" order. Start with the first order, then the next and so on Backward scheduling: looks at the order due date and schedules backwards
____ levels out the production strategy for both volume and variety. the board is very visual and tells you what's going on
Heijunka
what is a good example of this prop: Prop 3: Anxiety makes the wait seem longer
I dont want to keep waiting in this line if they could be out of whatever I want
stopping production because of a defect is called ____.
Jidoka
is MRP an assembly line or a job shop
Job shop
what did we learn from the guitar video
Job shop. Low specialization High skilled employees
when scheduling a two-machine process you can use
Johnsons rule
LPT means __________ goes first
Longest Processing time
technique orders just what is required for production based on net requirements
Lot for lot- L4L
___ Is a tool that helps us order parts pieces and components
MRP
___ can sometimes be apart of someones ___ system (ERP or MRP)
MRP; ERP
what is a good example of this prop: Prop 2: Preprocess Wait feels longer than in-process wait
McDonalds- order here, pay here, pickup here
As a service provider, after you decide how you want to set up your service (service characteristics), You will figure out how you want people to wait in line. this is called the _______
Queue configuration
_____ _______ tells people how to behave in the line
Queue disciplines
according to MRP, you will receive the inventory ________
RIGHT BEFORE you sell all the product
___ is a german company, leader in ERP software. their software is known as ___
SAP; R3
do you know what the different type of queue configurations are
Serpentine, hospitality line
SPT means _________ goes first
Shortest Processing time
STR stands for
Slack Time Rule
Usage of kanban and what that does
Tells you what inventory you need to order
do you want your critical ratio to be below or above 1
above
______ is when customers dont even bother getting in line because the line looks too long
balk
infinite loading vs finite loading
capacity is not considered They accept every single order they receive. vs finite loading, once you hit the capacity that is the max orders possible to do do
Johnsons rule limits the amount of _____
downtime
single phase vs multiple phase
either one person can be helped at once, vs multiple people being helped at the same time
what is a good example of this prop: Prop 6: Unfair Waits are longer than equitable waits
everything needs to be fair
continuous improvement has to do with which word with this section
kaizen (cake example)
The _____ happens within the chart, the _____ happens between charts
lead time; per
A job shop has a ____ demand schedule and that goes with ___
lumpy; MRP
2 ways to calculate run out time
one looks at the demand rate and how much inventory you have left and one looks at how long you have until the due date compared to when you will run out of that material? maybe
______ is when a customers in line and they leave because its taking too long
renege
How do you figure out the number of kanban cards in a system
reorder point/ what the container holds
Assembly line has a _____ demand/ level production strategy
steady
what is a good example of this prop: Prop 4: Uncertain waits are longer than Known, finite waits
tells us HOW LONG the wait will be. states "this will be 30 minutes or less"
what is a good example of this prop: Prop 5: Unexplained Waits are longer than Explained waits
tells us WHY the wait is so long
what is a good example of this prop: Prop 8: Solo waits feel longer than group waits
waiting in line at cedar point with friends
what is a good example of this prop; Prop 1: Unoccupied time feels longer than occupied time
watching something while pumping gas or sitting in a waiting room