An automated storage/retrieval system for work-in-process has five aisles. The storage racks in
each aisle are 10 m high and 50 m long. The S/R machine for each aisle travels at a horizontal
speed of 2.0 m/s and a vertical speed of 0.4 m/s. Pick and dep
An AS/RS with one aisle is 300 ft long and 60 ft high. The S/R machine has a maximum speed
of 300 ft/min in the horizontal direction. It accelerates from zero to 300 ft/min in a distance of 15
ft. On approaching its target position (where the S/R machin
The length of one aisle in an AS/RS is 100 m and its height is 20 m. Horizontal travel speed is
4.0 m/s. The vertical speed is specified so that the storage system is "square in time," which
means that L/vy = H/vz. The
pick-and-deposit time is 12 s. Det
A unit load automated storage/retrieval system has five aisles. The storage racks are 60 ft high and 280 ft long. The
S/R machine travels at a horizontal speed of 200 ft/min and a vertical speed of 80 ft/min. The pick and deposit time =
0.30 min. Assume
An AS/RS with four aisles is 80 m long and 18 m high. The S/R machine has a maximum speed
of 1.6 m/s in the horizontal direction. It accelerates from zero to 1.6 m/s in a distance of 2.0 m.
On approaching its target position (where the S/R machine will
A 10-aisle automated storage/retrieval system is located in an integrated factory-warehouse
facility. The storage racks in each aisle are 20 m high and 110 m long. The S/R machine for each
aisle travels at a horizontal speed of
2.5 m/s and a vertical sp
Your company is seeking proposals for an automated storage/retrieval system that will have a
throughput rate of 275 storage/retrieval transactions/hour during the one 8-hour shift per day.
The request for proposal indicates that the number of single com
A single carousel storage system has an oval rail loop that is = 30 ft long and 3 ft wide. Sixty carriers are equally
spaced around the oval. Suspended from each carrier are 5 bins. Each bin has a volumetric capacity = 0.75 ft .
Carousel speed = 100 f
An automated storage/retrieval system has five aisles. The storage racks in each aisle are 40 ft
high and 200 ft long. The S/R machine for each aisle travels at a horizontal speed of 400 ft/min
and a vertical speed of 60 ft/min. If the pick and deposit
What are the drawbacks of manual collection and entry of data?
Three drawbacks are identified in the text: (1) Errors. Errors occur in both data collection and
keyboard entry of the data when accomplished manually. (2) Time factor. Manual methods
The AS/RS aisle of Problem 11.5 will be organized following a class-based dedicated storage
strategy. There will be two classes, according to activity level. The more active stock is stored in
the half of the rack system that is located closest to the i
A carousel storage system is to be designed to serve a mechanical assembly plant. The specifications on the system
are that it must have a total of 400 storage bins and a throughput of at least 125 storage and retrieval transactions
per hour. Two altern
Identify the three application areas of automated storage/retrieval systems.
The three AS/RS application areas identified in the text are
unit load storage and handling,
order picking, and
What are the four basic components of nearly all automated storage/retrieval systems?
What is the advantage of a vertical storage carousel over a horizontal storage carousel?
The four basic components of nearly all automated storage/retrieval sys
There is a plan to install a continuous loop conveyor system with a total length of 1000 ft and a
speed of 50 ft/min. The conveyor will have carriers that are separated by 25 ft. Each carrier will
be capable of holding one part. A load station and an un
A recirculating conveyor has a total length of 200 m and a speed of 50 m/min. Spacing of part
carriers = 4 m. Each carrier holds two parts. Time needed to load a part carrier = 0.12 min.
Unloading time is the same. The required loading and unloading rat
An automated storage/retrieval system installed in a warehouse has five aisles. The storage racks
in each aisle are 30 ft high and 150 ft long. The S/R machine for each aisle travels at a horizontal
speed of 350 ft/min and a vertical speed of 60 ft/min.
An AS/RS is used for work-in-process storage in a manufacturing facility. The AS/RS has five
aisles, each aisle being 120 ft long and 40 ft high. The horizontal and vertical speeds of the S/R
machine are 400 ft/min and 50 ft/min, respectively. The S/R m
The length of the storage aisle in an AS/RS = 240 ft and its height = 60 ft. Suppose horizontal
and vertical speeds of the S/R machine are 400 ft/min and 60 ft/min, respectively. The S/R
machine requires 18 sec to accomplish a pick and deposit operation
A unit load AS/RS for work-in-process storage in a factory must be designed to store 2000 pallet
loads, with an allowance of no less than 20% additional storage compartments for peak periods
and flexibility. The unit load pallet dimensions are: depth (x
Each aisle of a six-aisle Automated Storage/Retrieval System is to contain 50 storage
compartments in the length direction and 8 compartments in the vertical direction. All storage
compartments will be the same size to accommodate standard size pallets
Given the rack structure dimensions computed in Problem 11.2. Assuming that only 75% of the
storage compartments are occupied on average, and that the average volume of a unit load per
pallet in storage = 0.90 m3, compute the ratio of the total volume o
A unit load AS/RS is being designed to store 1000 pallet loads in a distribution center located
next to the factory. Pallet dimensions are: x = 1000 mm, y = 1200 mm; and the maximum height
of a unit load = 1300 mm. The following is specified: (1) the AS
An automated guided vehicle system has an average travel distance per delivery = 200 m and an
average empty travel distance = 150 m. Load and unload times are each 24 s and the speed of the
AGV = 1 m/s. Traffic factor = 0.9. How many vehicles are needed
Materials stored in manufacturing include a variety of types. Name six of the ten categories listed
in Table 11.1.
The material types listed in Table 11.1 are (1) raw materials, (2) purchase parts, (3) work-inprocess,
finished product, (5) re
Name the four traditional (non-automated) methods for storing materials.
Which of the four traditional storage methods is capable of the highest storage density?
The four traditional methods for storing materials are
(1) bulk storage,
(2) rack sy
What is a conveyor?
As defined in the text, a conveyor is a mechanical apparatus for moving items or bulk materials,
usually inside a facility. Conveyors are used when material must be moved in relatively large
quantities between specific locatio
What are the two basic categories of automated storage systems?
The two basic categories of automated storage systems are
automated storage/retrieval systems and
carousel storage systems.
An AGVS has an average loaded travel distance per delivery = 400 ft. The average empty travel
distance is not known. Required number of deliveries per hour = 60. Load and unload times are
each 0.6 min and the AGV speed = 125 ft/min. Anticipated traffic