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TUTORIAL 1
MATERIAL TRANSPORT SYSTEM
1. Provide a definition of material handling.
2. Name the four major categories of material handling
equipment.
3. What is included within the term unitizing
equipment ?
4. What is the unit load principle?
. What are the five categories of material transport equipment
commonl! used to move parts and materialsinside a facilit!?
". #ive some e$amples of industrial truc%s used in material
handling.
&. What is an automated guided vehicle s!stem '(#)*+?
,. What is a conve!or and name some of the different t!pes of
conve!ors used in industr!.
-. What is the difference etween a hoist and a crane
Analysis of Vehicle-based Systes
1/. ( planned fleet of for%lift truc%s has an average travel
distance per deliver! 0 // ft loaded and an averageempt! travel
distance 0 3/ ft. he fleet must ma%e a total of "/ deliveries per
hour. oad and unload timesare each /. min and the speed of the
vehicles 0 3// ftmin. he traffic factor for the s!stem 0
/.,.(vailailit! 0 /.- and wor%er efficienc! 0 -/5. 6etermine 'a+
ideal c!cle time per deliver! '+ the resultingaverage numer of
deliveries per hour that a for%lift truc% can ma%e and 'c+ how man!
truc%s are required toaccomplish the "/ deliveries per hour.
11. (n automated guided vehicle s!stem has an average travel
distance per deliver! 0 2// m and an averageempt! travel distance 0
1/ m. oad and unload times are each 24 s and the speed of the (#) 0
1 ms. rafficfactor 0 /.-. 7ow man! vehicles are needed to satisf! a
deliver! requirement of 3/ deliverieshour? (ssumethat availailit! 0
/.-.
12. 8our for%lift truc%s are used to deliver pallet loads of
parts etween wor% cells in a factor!. (verage traveldistance loaded
is 3/ ft and the travel distance empt! is estimated to e the same.
he truc%s are driven at anaverage speed of 4 mileshr when loaded
and mileshr when empt!. erminal time per deliver! averages 1./min
'load 0 /. min and unload 0 /. min+. 9f the traffic factor is
assumed to e /.-/ availailit! 0 1//5 andwor%er efficienc! 0 /.-
what is the ma$imum hourl! deliver! rate of the four truc%s?
13. (n (#)* will e used to satisf! material flows indicated in
the from:to ;hart in the tale elow which showsdeliveries per hour
etween stations 'aove the slash+ and distances in meters etween
stations 'elow theslash+. = indicates moves in which thevehicle is
empt!. 9t is assumed that availailit! 0 /.-/ traffic factor 0 /.,
and efficienc! 0 1./. *peed of an(#) 0 1.1 ms. 9f load handling
time per deliver! c!cle 0 1./ min determine the numer of vehicles
neededto satisf! the indicated deliveries per hour? (ssume that
availailit! 0 /.-/.
o 1 2 3 4
8rom 1 // --/ &12/ &2 >-/ // /N( 4,/3 &>12/
/N( // /N(4 ->& /N( /N( //
14. (n automated guided vehicle s!stem is eing planned for a
warehouse comple$. he (#)* will e adriverless train s!stem and each
train will consist of the towing vehicle plus four carts. *peed of
the trains will
e 1"/ ftmin. @nl! the pulled carts carr! loads. he average
loaded travel distance per deliver! c!cle is 2///ft and empt!
travel distance is the same. (nticipated travel factor 0 /.-.
(ssume reliailit! 0 1./. he load
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handling time per train per deliver! is e$pected to e 1/ min. 9f
the requirements on the (#)* are 2 cartloads per hour determine the
numer of trains required.
1. ( warehouse consists of five aisles of rac%s 'rac%s on oth
sides of each aisle+ and a loading doc%. he rac%s!stem is four
levels high. 8or%lift truc%s are used to transport loads etween the
loading doc% and the storagecompartments of the rac% s!stem in each
aisle. he truc%s move at an average speed 0 14/ mmin 'loaded+
and1,/ mmin 'empt!+. oad handling time 'loading plus unloading+ per
deliver! totals 1./ min perstorageretrieval deliver! on average and
the anticipated traffic factor 0 /.-/. Wor%er efficienc! 0 1//5
andvehicle reliailit! 'availailit!+ 0 -"5. he average distance
etween the loading doc% and the centers of aisles1 through are 2//
m 3// m 4// m // m and "// m respectivel!. hese values are to e
used to computetravel times. he required rate of storageretrieval
deliveries is 1// per hour distriuted evenl! among the fiveaisles
and the truc%s perform either storage or retrieval deliveries ut
not oth in one deliver! c!cle.6etermine the numer of for%lift
truc%s required to achieve the 1// deliveries per hour.
1". *uppose the warehouse in the preceding prolem were organiAed
according to a class:ased dedicated storagestrateg! ased on
activit! level of the pallet loads in storage so that aisles 1 and
2 accounted for &/5 of thedeliveries 'class (+ and aisles 3 4
and accounted for the remaining 3/5 'class B+. (ssume that
deliveries inclass ( are evenl! divided etween aisles 1 and 2 and
that deliveries in class B are evenl! divided etweenaisles 3 4 and
.7ow man! truc%s would e required to achieve 1// storageretrieval
deliveries per hour?
1&. ach (#) carries four pallets and travels at aspeed of
2// ftmin 'either loaded or empt!+. he pallets form queues at each
end of the line so that neitherthe production line nor the (#)s are
ever starved for pallets. ime required to load each pallet onto an
(#) 01 secD time to release a loaded (#) and move an empt! (#) into
position for loading at the end of the line 012 sec. he same times
appl! for pallet handling and releasepositioning at the unload
station located at thefront of the production line. (ssume the
traffic factor is 1./ since the route is a simple loop. 7ow
man!vehicles are needed to operate the (#) s!stem?
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