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CIM LAB B4 PArt 2 > Chapter 11 > Flashcards

Chapter 11 Flashcards

1
Q

Types of materials normally stored in a factory

A
  1. Raw Materials
  2. Purchased Parts
  3. Work-in-process
  4. Finished Product
  5. Rework and Scrap
  6. Refuse
  7. Tooling and Supplies
  8. Spare parts
  9. Office Supplies
  10. Plant records
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2
Q

What metrics are used to measure the performance of a storage system?

A
  1. Storage Capacity
  2. Storage Density
  3. Accessibility
  4. Throughput
  5. Utilization
  6. Reliability
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3
Q

Storage capacity can be defined in 2 ways

A
  1. The total metric space available OR

2. the total number of storage compartments in the system available to hold items or loads

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4
Q

What is storage density

A

The volumetric space available for actual storage RELATIVE to the total volumetric space in the entire storage facility.

As storage density increases accessibility decreases

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5
Q

What is system Throughput

A

The hourly rate which the storage system

  1. Receives and puts loads into storage and/or
  2. retrieves and delivers loads to output station

Lookup S/R transaction

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6
Q

What is the difference between a dual command and a single command cycle

A

A dual command cycle is when an S/R transaction can be completed in one cycle

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7
Q

What is utilization

A

The proportion of time that the system is actually being used for S/R transactions compared with the time it is available.

What would low and high versions of this mean

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8
Q

Reliability

A

the measure of system reliability and defined as the proportion of time that the system is capable of operating compared with the normally scheduled shift hours

Measure of downtime

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9
Q

2 basic strategies for organization

A
  1. Randomized Storage

2. Dedicated Storage

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10
Q

What is SKU

A

Stock Keeping Unit-identifies item type

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11
Q

What are the 2 basis for specifying storage locations

A
  1. Items stored in part number or product sequence number
  2. Items are stored according to activity level, more active SKUs being closed
  3. Items are stored according to their activity-to-space ration, higher rations being closer
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12
Q

What is class based Dedicated storage system?

A

A storage system is divided into several classes according to activity level and a randomized storage strategy is used within each class

Classes with more active SKUS are closer

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13
Q

Types of storage equipment

A 
Bulk Storage
Rack Systems
Shelves and Bins
Drawer Storage
Automated Storage Systems
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14
Q

2 types of automated storage systems

A
  1. Fixed Aisle Automated S/R

2. Carousel Storage system

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15
Q

What are several fixed-aisle automated S/R systems

A
  1. Unit Load AS/RS-single units stored in pallets or containers
  2. Deep Lane AS/RS-High density,large Quanity, small SKU’s. Stores 10 or more in a single rack-flowthrough
  3. Miniload AS/RS-handles small loads contained in bins or drawers
  4. Man-on-board S/RS-human operator rides carriage of S/R device
  5. Automated item retrieval-used for items stored in lanes rather than bins or drawers, push from lane to conveyor
  6. Vertical Lift Modules-the ones before were based on horizontal aisles. Now those aisles are vertical
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16
Q

3 applications of AS/RS

A
  1. Unit load storage and handling
  2. order picking
  3. Work-in-process storage
17
Q

Disadvantages of keeping WIP in inventory in plant

A

1.Time spent searching for orders
parts or entire orders can become permanently lost
3.orders not being processed according to their relative priorities in each cell
4.Orders spending too much time in factory causing late deliveries

18
Q

What are some reasons to justify the installation for WIP automated storage systemms

A
  1. Buffer storage in production-for in between waiting for next step
  2. Supports JIT delivery-just in time, is a strategy where required parts or assembly are received immediately before they are needed
  3. Kitting of parts for assembly-collected parts are stored in kits
  4. Compatible with Auto ID systems-like bar code readers
  5. Computer control and tracking of materials
  6. Support of factory wide Automation-
19
Q

What are the components and features of an AS/RS

A
  1. Storage Structure
  2. S/R machine
  3. Storage modules-pallets etc
  4. one or more pick-and-deposit stations
20
Q

3 drive systems required for S/R macine

A
  1. horizontal
  2. vertical
  3. and shuttle transfer
21
Q

What is an item location file

A

Record of locations of materials stored

22
Q

2 types of carousel storage systems

A
  1. Overhead systems(top driven)

2. floor mounter(bottom driven

23
Q

Applications of Carousel storage systems

A
  1. S/R operations
  2. Transport and accumulation
  3. WIP
  4. Specialized use
24
Q

AS/RS throughput is

A

hourly rate of S/R transactions that the AS can preform

CIM LAB B4 PArt 2 (14 decks)

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