modeling and simulation cost-time profile of business processes

8/16/2019 Modeling and Simulation Cost-time Profile of Business Processes

1/6

1MODELING AND SIMULATION COST-TIME PROFILE OF BUSINESSPROCESSES

Obrad Aničić1, Srđan J!ić", Bran# P$%!ić&, L%i'%ana Sa!ić(, Mir)'a! Pa!'!ić*,

1Faculty of Technical Science, Kosovska Mitrovica, University of Priština1Faculty of Technical Science, Kosovska Mitrovica, University of Priština1Faculty of Technical Science, Kosovska Mitrovica, University of Priština1Faculty of Technical Science, Kosovska Mitrovica, University of Priština1Faculty of Technical Science, Kosovska Mitrovica, University of Priština

stavi sebeda li ti trebaju mejlovi ili samo naiv fa!a

Ab)+ra+" New strategies and tools have been investigated constantly to improve processes, decreases cost and increase productivity and efficiency. Scheduling of the production is one of the main element in the processes and hasan influence on delivery deadlines and also on the production process in terms of its application. For the leanmanufacturing efforts the values stream optimization is very important. The main aim of the paper is to research theimpact of business processes on value stream optimization and decreasing of cost-time investment. Mapping of thevalue stream is a very efficient tool for the visualization of process activities within production flow focused on

activity duration with the purpose to eliminate non-value added activities. osting of the value stream eliminated theneed for allocation and calculation. ost-time profile is a powerful tool for visualization and calculation of cost accumulation during the time across the entire business process flow. !e"in scheduling system is a software used inthis paper for construction of the process schedules based on four different rules. ost-Time #rofiler software is alsoused for simulation of the influence of different process schedules on total production cost and cost-time investment.

$. /rd)" model, simulation, process, cost-time profile, lean manufacturing.

1# $ %T&'(U)T$'%

Modern business *rocess have the conditions from the +lobal market to force manufacturers to increasecom*etitiveness hich can be achieved by develo*in+ fle!ible manufacturin+ systems, *roducin+ the hi+h-uality *roducts and reducin+ *roduction costs# $n the same time the manufacturers have to *ay more attention

to *roducti variation, value of customers and delivery deadlines since mass *roduction is not efficient at thistime# To increase *roduction effectiveness, com*anies could select the strate+y of constant im*rovementthrou+h aste elimination# Process of the efficient *roduction ith hi+h -uality control has become veryim*ortant for bussiness *rocesses in all comanies to meet customers. satisfaction /10#

&eduction of the time and cost is the most im*ortant for every business *rocess in com*anies hence themonitorin+ and contorl of manufacturin+ cost over the time can be a +ood base for im*rovements# y usin+ theless consumable in manufacturin+ couls be a +ood strate+y for money makin+ an money savin+s could also beachieved by *reventin+ aste /20#

The customer value is the *riority in modern economy as ell as monitorin+ the cost of resources usa+e and *roductivity# 3i+her out*ut and hi+her *roductivity are achieved ith overall added value by lead timereduction, so manufacturers have to develo* *rocesses hich could create its added value as fast as *ossible/40# 5ith the im*lementation of modern business a**roaches, com*anies have to chan+e business *roceduresin +eneral to be com*atible ith ne manufacturin+ systems /6780# $nformation are the most im*ortantresources in modern business environment, so information collection in the a**ro*riate ay is a bi+ challen+efor com*anies# $nformation collection from the bussiness *rocesses is mainly used in mass *roduction and *roduct cost is the crucial fact for mana+ement# $n many com*anies identification and reco+nition of thecom*lete value stresm is not a**licable#

2# 9:;% M;%UF;)TU&$%


2/6

elimination and the main aims are cost reduction and increasin+ *roduction system efficiency /?0# ;ccordin+ tothe article /@0 the lean *roduction ill be su**lant mass *roduction and other business a**roaches in allindustrial areas and become a standard +lobal *roduction system of the 21th century# 9ean mana+ementim*lementation is necessary in order to increas *roductivity, reduce costs, increase fle!ibility and create morevalue for the customer /1A0#

2# B;9U: ST&:;M )'ST$%


3/6

Fi+# 2 )ost7time *rofile

6# US$%:SS P&'):SS S)3:(U9$%0# $t is very difficult *roblem since it re-uires lar+e combinatorial search s*ace/1?0# The value stram ma**in+ for a business *rocess should be fle!ible to deal ith the dynamic nature of jobsho*s /1@0#

8# P&'9:M (:F$%$T$'%

$n this *a*er the main aim is to investi+ate the im*act of chan+es in schedules on decreasin+ of total costand cost7tome investment# $n other ords the cost dimension is included of schedulin+ hich de*ends de*endson be+innin+ time of jobs and ho lon+ they are *erformin+# Ma**in+ of the value stream and job schedulin+have +oals also to decrease lead time and *roduction cost as ell as to increase customer value# )ost7time

*rofile has aim to sho cost accumulation durin+ the time therefore this tool is used to simulate differentscenarios after im*lementation of different schedules#$n the be+innin+ the 1A data sets are +enerated for a business job consistin+ of five machines and seven

business jobs in each data set# ;ll 1A variants ere e!amined and the reuslts ere similiar and therefore in this *a*er is *resented one re*resentative sam*le as it shon in Table 1# &os in the ri+ht columns contain theorder of the o*erations for each job" each entry contains the inde! of machine and the *rocessin+ time on it#

Table 1" (ata about cost7time *rofile com*onents

Jb) R$'$a)$ da+$ D2$ da+$ Ma4in$)5Pr$))in6+i7$)

; A 4@ 1C> 2C= 4C? 6C@ 8C6 A 62 2C4 1C? 8C4 4C? 6C@

) A 61 4C4 2C> 1C> 8C@ 6C>( A 61 2C4 1C6 4C@ 6C4 8C4: A 4= 2C8 4C6 8C6 6C2 1C>F A 6A 2C@ 1C2 4C? 6C@ 8C=< A 4? 8C@ 2C@ 6C= 4C2 1C4

$n the analysis very ti+ht due dates are used to reflect the differences better# (ue dates are related to the totalork content#

These in*uts are used to calculate the be+innin+ and the end time for each of these > business jobs# Threedis*athicn+ rules are a**lied"

10 Ear'i$)+ D2$ Da+$,"0 Cri+ia' Ra+i,&0 Mini727 S'a# Fir)+#

9ekin schedulin+ system is used in this sta+e of research to construct the schedules# Table 2 *resents the


4/6

schedulin+ results#

Table 2" 'ut*ut data from 9ekin softare

Di)8a+4in6r2'$)

Jb) I II III

S+ar+ - End S+ar+ - End S+ar+ - End

; A 7 61 A 7 >2 A 7 81 61 7 @A @ 7 >> @ 7 8@) A 7 >6 A 7 86 A 7 ==( 41 7 >A 4@ 7 =2 4@ 7 >2: A 7 22 28 7 8> 28 7 8>F 22 7 8? A 7 6? A 7 6>< A 7 44 A 7 8A A 7 =@

To visualie schedule and sho ho different rules cause different leas time,


5/6

Fi+# 6 )ost7time *rofile for the dis*atchin+ rule $

Fi+# 8 )ost7time *rofile for the dis*atchin+ rule $$

Fi+# = )ost7time *rofile for the dis*atchin+ rule $$$


6/6

8# )'%)9US$'%

4#11# Sobcyk, T#, Koch, T#, 2AA?, Method for Measuring 1perational and Financial #erformance of a #roduction *alue Stream, 9ean

usiness Systems and eyond, $F$P $nternational Federation for $nformation Processin+, 28>D1E, **# 18171=4#12# Ka*lan, S#, 1@?4, Manufacturing #erformance $ New hallenge for Managerial $ccounting , The ;ccountin+ &evie, 8?D6E, **#

=?=7>A8#12# Maskell, #3#, a++aley, #, 72A8#1?# >718?2#1@# ;lves, T#, Tommelein, $#, allard,

modeling and simulation cost-time profile of business processes

Documents