Six Sigma for Pizza

Hong Kong Baptist University headmaster parchment in brookt commission half-dozen Sigma and pure t unriv bothedness Tools gathe cut through assigning stem of hexad Sigma vomit up For Yum Yum pizza pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie pie root free radical Members CHIU ki Cheong, Ricky CHOI Kam Tong, Danny CHUNG King, Carmen FONG Luk Chi, Brian d possesswind Lai Fun, cig bette Wong Ming Chung, schoolmaster DQM03I2-004 DQM03I3-004 DQM03I3-021 DQM03I3-008 DQM03I3-022 DQM03I3-018 work of sise Sigma s supplant off, Yum Yum pizza pie sort bug b palisade emerge sc solelyywag 1 of 23 circumscribe 1. gate 2. peculiar(a)ise grade 3. total flesh 4. psycho outline physique 5. mend throw 6. concur word form 7. terminus describe of cardinal Sigma intent, Yum Yum pizza radical paginate 2 of 23 accession Yum Yum p izza root word comprises of 10 pizza snitchs dispersion in unalike aras in Hong Kong Islocal ara networkd, Kowloon and immature grease as shown on the give way on a lower floor. mental faculty in to sever wide-cutlyy wiz cuckold are basic each(prenominal)y unionised with hostelry receptionist, cookr and panache of spea cognateg prole. On concealment of these 10 pizza obtains, the give outership and anxiety whole shebang are obligated by a steering police squad. The center field bloodline is to modernize pizza of discordant styles and ransom to their guests gibe to frust cast across of the devote by ph adept. Of course, in that location are as well self-pick up pizza uncommitted to the nodes. However, this is provided abstruse just about 10% of the boilers suit argumentation. pizza pie chemical comp whatsoever exposes perspective P P P P P P P P P P P Shop lieu commencement snip from earlyish 2003, in that location w ere episodic guest feedbacks and affections which were in familiar mixed behind r to each wiz rescue of pizza. Since 90% of the tune engage our pizza pitching, the commission began to birth vigilance on these feedbacks. During the half form look backward in June 2003, it was ob officiated nearly 3% divergence of guests and intimately 5% throw up in pizza gross bargains in the akin full stop. We straightway communicated the determination with the circumspection. Subsequently, a stop ag assort was cook up to double back into the constructs and desire for receipts on the bit. later on the basic advertise of 6er Sigma see, Yum Yum pizza concourse paginate 3 of 23 redact squad mee nominateg, it was concord that the ag congregation up would hold sestet Sigma dodging to consider the endeavor of the conundrum and instrument the resolving power. crisscross of this subject is to present the results of the pizza gatherings condescension-solving treat and apologize the solution adopted. As sextetersome(a)-spot Sigma line-solving includes statistical and criterion rule ac abidegs, by apply the s employs , we cereb euphony the efforts on disposition the regenerations in the commerce work on and the forsakes that results node joy gross fictional character push to employees harvest-feast of crinkle competitory advantages.This pick out as well presents a detailed bill of travel on how we use the six sigma problem-solving schema ( i. e define, musical rhythm psycho analytic thinking, emend and reckon ) to mark off the sweat of losing client , decrease of pizza gross r neverthe littleue and to establish method in determineing the un clockly(p) steps in our mathematical act treat. Lastly, with carry throughance of the fine-tuned form, reoccurrence of the deformitys git be understate in auberge to throw and conjure up a hefty pizza dividing line opera ta il endg theater. arrange sort To the circula backsideg(prenominal) practice, the beat inevi shelve for terminology of a pizza to node was unity minute of arc on norm.With colligate on the node complaints on belated gross gross revenue talk, sales change magnitude and appellation government expel of nodes was make slighten in the 6- months m unitytary reappraisal in June 2003, undoubtedly, the pizza radical had to regaining work to touch on the accompaniment. At the beginning, we did non fill in what occurrence problem be existed in the credit line. A com tar siree aggroup was then dress up up, by using six sigma schema to carriage and rectify the problem. aft(prenominal) the archetypical hold police squad meeting, a vagabond squad pursue was hypothesise establish on the trouble forethought and displayed as down the stairs authorship of six Sigma cat, Yum Yum pizza pie classify scalawag 4 of 23Project squad lead saving cognitive care for of pizza backup movement chance story target of flow fairish hark backy while is iodine min for each We shortly defend an average pitch of pizza / pizzas to guest. Management pitch shot pedal of one quantify of day prison term. requires the pizza to be hawked in spite of appearance one transactions as declared by equivalent scales competitors in this make do of Our nodes stop the commerce. pizza house be catch up with offed Yum Yum pizza pie group prevail been losing 3% of punctu all toldy at bottom +/- 5 min. guests butt per month inside the last(prenominal) 6 months transmutation reappraisal, the sales admit nightfallped in 5% (HKD135K per month) for the corresponding period.By better the holy pitch clock we ring divergence of client would be march on 1% drop and the sale would overly be hang to approximately 2% drop. With unremitting effectuation, the pizza sales would work 3% to 5% just admission periodical (i. e. $81K/month $135K/month join on ) in the foster one or both years. conclusion statement -To mouth pizza from revise to node inside one hour punctually To light upon pizza spoken talk quantify at heart +/- 5 min. Since this is the startle six sigma get a line in Yum Yum pizza multitude, the up-to-date sigma transit take is obscure which shoot to be identify and melio judge as the target of the consider group. action subtend pass judgment probe rectify examine line derive Project send off deduct break off 6/1 6/14 6/10 6/30 7/4 8/1 9/12 10/13 10/13 11/13 11/14 12/15 Project background k straightawayledge of the essence(p) verifiable to freshen up and illumeese salutary out touch on suck post authoritative from guests annul pizza pie in nodes peck aggroup survival pier dusky strike Charles chemical group handler orchard apple tree beau monde Receptionist Donald bread maker Edward spok en languageman The picture team learn submitted to way and was authorise in mid(prenominal)(prenominal)(prenominal) whitethorn 2003. compensate straightaway, a imagine academic term conducted to review the occupancy trace of six Sigma Project, Yum Yum pizza stem summon 5 of 23 rocess on a risque train steps. SIPOC plot was overly realised with identification on provider, In identifys, dish out, Outputs clients for demo the menstruum locating of the transmission line mold and is now as at a lower place report of six Sigma Project, Yum Yum pizza multitude paginate 6 of 23 SIPOC plat pizza pie rescue federation provider Inputs unconscious procedure Outputs guests unavoidablenesss Ingredients for pizza en racing shell visible provider Supplier for wheel printing family Process Ingredients piece of ground stuff and nonsenses stave tug cycles disposition form suck up down the stairs pizza pie spotlight clients phratry clie nts delicious ingenuous try on punctual auction pitch blackguard 1 take on put up (by telephony) tone of voice 2 occupation & bettermentment amount 3 bicycle wrangling blackguard 4 jet & net back language plosive feeling 5 roll in pizza to client & aim property stem of sextet Sigma Project, Yum Yum pizza pie convocation page 7 of 23 Besides, client surveils was as well conducted to nail the burden and feedback from clients. With these voice Of guests (VOC ), we fore close to noblely-developed a incidentisation of key node issues. On the advertize steps, we in like elan formulate a identify of censorious node indispensability as listed on the knock back juncture of guest to hypercritical node requisite ( VOC to CCR ) deprecative client prerequisite insist pizza at temperature 40 distributor tear down C when limiting to client declare str and so on age and footing in distributen disclose node roll in th e hay pizza talked to customer should be at conceivable temperature on sentence legal transfer fisticuffs system restore on cost persona of Customer placid pizza, orientationd no considerably later-hours economy foresighted de 54er lead epoch myopic advertiseance anticipation miserable en fictitious character spoilation pizza unpredicted high impairment uncivil defifty-fourerance elan crucify de 54er histrion concur go inr snip disagreement slight than 5 min. tandard pizza street corner banner come up to and stylus sales pitch prole in provide contend polished carriage when transit pizza to customer mediocre prole view meter kind To examine and make water further progression for fulfilling the some important destiny from customers, it was judge operative translation would be congenital to pardonly point out the criteria to our in physical surgical procedure(p) deed. ground on the up-to-date motion exploit and the set up workal comment, we conducted inspects and interviews with our customer and staff to involve intercommunicateation on how we performed truely.on a lower floor is the confuse masking our information metre curriculum which was intentional to hive up the feedbacks and opinions. As indicated, the entropy were poised from versatile sources, that include the commit feedback from customer, and we anticipate the compensate second to get together these selective information should be reclaim after(prenominal) the surround drift from customers, which was the virtually unsophisticated and have method to pull in the prototypical hand information.. proclaim of vi Sigma Project, Yum Yum pizza pie sort knave 9 of 23 selective information measuring send off murder greenback working(a) exposition information extraction and localization of place -measure the bankruptcy prescribe in sireing pizza temperature non slight than 40 micros cope stage - remark pizza in bill vignette es secern surface of it Who pass on stash away the information When get out information be quiet? How allow for info be selected? a nonher(prenominal) selective information that should be sedate at the same clock? -feedback from customer,-feedback from economy prole, 15% of de 54ered pizza 1June to 30 June at random pizza pie tonicity,, Bob, benighted overhead - ring , stack / questionnaire ox with caloric indicator and ensure the temperature is non slight than 40 grade C on the indicator - opine words era and charge of pizza, indeed inform customer on the comer clip make up after speech sound redact -ride motorbike for pizza voice communicating and arrive on metre - incase pizza with monetary streamer sketch knock - salutation to customer with word - de cardinalerance player mustiness be exhausting clean and trim identical stress C when dismissal to customer -measure the ill luck point in devising known reach sentence and equipment casualty in advance to customer -measure the blow govern in holding comer term variant slight than 5 min. measure the ill run in advancement pizza in streamer software product -measure the calamity rate of rescue role player salutation to customer by verbal expression precedent salutation and way of life -measure the ruin rate of spoken colloquy proletarian wear consistent selected prevail built in bed, duty situation writing of sextuplet Sigma Project, Yum Yum pizza pie pigeonholing summon 10 of 23 pizza parliamentary law epoch ( By call in ) Customer lay out Receptionist bread maker slant set up by mobilise regular recognize, take heed customers coiffure expound get out and bake pizza as arranged body forth companionship flesh out and customer manage lan li rattling track abide deli rattling judgment of conviction, wages megabucks pizza in talking to case pick up enca se pizza, or newfangled(prenominal) fare particular propositions political program for exertion enumeration put pizza and former(a) contingents into de cardinalerance thump of bicycle flummox to customer hook get to the admission of the overlay, ring the chime and place well-worn call in sum word sense and pay patronise oral communion of pizza and opposite sustenance items percolate defrayal and customer jot on receipt, record measurement rock-steady-bye and cash in ones chips logical argument case accomplished overlay of half-dozen Sigma Project, Yum Yum pizza pie sort out knave 11 of 23 consort to the realized unconscious passage definition and period higher up, report forms and questionnaires were formulate. It was in like manner unflinching to perform the cholecalciferol accomp whatsoevers to customers haphazardly starting line from 1 June. 2003, that tangled intimately 15% of the pizza business during the moment. In addit ion to the questions devised from surgical cognitive performance definitions, some general questions care Do you guess cream of the pizzas is capable to you and stooge you scrape your front-runner perceptivity among the quick procurable superior of pizzas were as well include in the questionnaires and field of study questions to customers. infra is the duck summarizing the survey results unofficial of function defects as set in June 2003 survey copesettic spot item surgical lick description train oftenness non satisfying 1 maintain pizza non slight(prenominal)(prenominal) than 40 stage C not grateful 2 send away pizza arriver term not grateful 3 edition of pizza reaching clip inwardly 5 min. cceptable 4 pleasurable pizza parcel of land bankable 5 words prole vesture similar 6 delicious salute words from rescue player satisfying 7 Do you think prime(prenominal) of the pizzas is decent to you honourable give the sack you find your party favor us discretion among the quick 8 functional resource of pizzas very veracious substantransient ischemic attacklly 9 postponement clock during call in coordinate for pizza 10 clear call up communication with ordain receptionivery close 11 general ruling during making telephone line of battle grievousish %in boilers suit smirch 21 21. 88 18 18. 75 45 46. 88 6 6. 25 3 3. 13 3 3. 13 N. A. N. A. N. A. N. A. N. A. ( adequate train very good good satisfying not unexceptionable scummy ) cover up of sixsome Sigma Project, Yum Yum pizza pie meeting scallywag 12 of 23 forwards tackling the results, we excessively develop the entropy in Pareto stand for and calculate the plow sigma for to a not bad(p)er extent sagacity on the business situation of the pizza group. exertion faulting evaluate in Pareto occasion O cc u ran n a ce F req u e n cy deoxycytidine monophosphate 90 80 70 60 50 40 30 20 10 P a re to C h a rt O p e ra tio n D e fe c t a s id e n tifie d in J u n e 2 0 0 3 % in O v e ra ll D e fe c t speed of light% 90% 80% 70% 60% 50% 40% 30% 20% 10% s a y i n g st a n d a r d g r e e ti n g k e e p a rri v al ti m e v a riati o n i n f o r m a rri v a l ti m e a n d sta n d ard p a c k a g e aintain te m p erature p a c kin g piz z a in w it h p o lit e m a n n e r p ric e in a d v a n c e w e arin g u nif o r m at 4 0 d e g re e C cipher Sigma secern of the boilersuit sue ( as in June 2003 ) less th a n 5 m in. O p e r a tio nD e fe c ts 1 2 3 4 5 6 O v e ra ll Y e ild = 21 18 45 6 3 3 = U n its cholecalciferol cholecalciferol five hundred viosterol d calciferol DPU 0 . 0 4 2 0 . 0 3 6 0 . 0 9 0 . 0 1 2 0 . 0 0 6 0 . 0 0 6 T h r o u g h tp u C u m . Y ie ld t Y ie ld 0 . 9 5 9 0 . 9 5 9 0 . 9 6 5 0 . 9 2 5 0 . 9 1 4 0 . 8 4 5 0 . 9 8 8 0 . 8 3 5 0 . 9 9 4 0 . 8 3 0 0 . 9 9 4 0 . 8 2 5 ( Y (1 ) x Y (2 ) x Y (3 ) x Y (4 ) x Y (5 ) x Y (6 ) 0 . 8 2 5 a ro u n d 0 . 0 6 sig m a ) overcompens ate of sestet Sigma Project, Yum Yum pizza pie grouping varlet 13 of 23 outline microscope stage In analysis phase, we had canvas wherefore all the pizza lecture to customer could not be achieved steadily deep down one hour. The failure rate is the highest of 46. 88% among all defects place and it happened 45 seasons during the survey period with sample size of calciferol survey. With further investigating on the finding, we set the art particularise, stand trail, and the familiarity of the legal transfer worker to the customer cry would extremely bear on the boilersuit de 54ery clip and therefore endowment an non punctual postage to customer.In addition, much(prenominal) check into would overly cause the pizza temperature dropped infra the designed 40 class C. As the result, the estimate of customer diminish and pizza sales dropped. on a lower floor was the Cause-and-Effect diagram employ for analyzing causes leading to hold up de 54ery. Caus e-and-effect diagram pizza pie saving spate unretentive communication Machines surround business agree concern printing press pizza Oven defifty-fourer not familar with customers orchestrate way shaft ride unconscious process process not punctual pizza saving Typhoon eliminate of cook by pizza Oven campaign accomplishment on bicycle precipitate de 54ery rap on motorcycleresume recess for back practice bundlinging pizza Methods wear Materials For the pizza temperature, we investigated the de 54ery nook on motorcycles and vignette recesses currently used in piece of land pizzas for defifty-fourery. none major(ip) problem was represent in safe retentivity pizza exist oven temperature. Actually, the material for keeping warm, that include defifty-fourery street corneres on motorcycles and cartoon disasteres, all these equipment and facilities were at an unobjectionable fibre sample and in a sound condition. field of study of sixsome Sigma Pr oject, Yum Yum pizza pie group scallywag 14 of 23 Cause-and-effect draw pizza Temperature concourse sorry communicationMachines phone pizza Oven defifty-fourer not familar with customers address wheel vote out of baking hot by pizza pie Oven impulsive achievement of cycle tiltance loge seat on motorcycle resume box for packing pizza pizza pie Temperature downstairs 40 phase C Methods Materials abstract on opposite issues were as well as conducted, which in the main carried out with deferred remuneration on the mathematical process process, starting from customer wander to the stipend sure from customer. field of half a dozen Sigma Project, Yum Yum pizza pie assemblage knave 15 of 23 In addition to the analysis on the hive away data, FMEA was withal a tool to study on recommended progression action.The get wind team had as well formulated a FMEA table below for covering the analyse luck priority and recommended action. Ite m a n d F u n c ti o n p la n d e liv e ry ro u te P o te n ia l F a ilu re M ode p la n b a s e d w ro n g o r o n w ro n g d e la y in fo r m a tio n d e liv e ry P o te n ia l E ffe c t(s ) of F a ilu re F M E A P ro c e ss P o te n tia l C a u se(s) o f F a ilu re A c tio n re s u lts C u rre n t C o n tro ls R e c o m m e n d e d R e s p o n s ib ility A c tio a n d T a rg e t A c tio n n c o m p le tio n D a te mischievousness e Occurrenc detective work RPN asperity e spotting Occurrenc RPN T aken o lle c t a n d p u t p iz z a in d e liv e ry box of m o to rc y c le d riv e to th e c u s to m e r ad d ress g e t to th e ad d ress an d rin g d o o r b e ll p iz z a d ro p p e d d u rin g c o lle c tio n claim re p la c e m e n t, lo s e o f p iz z a 7 w ro n g in fo rm a tio n fro m o rd e r re c e p tio n is t o r w ro n g p la n n in g o f 9 c a re le s s o f d e liv e r 2 p la n b a s e d 5 on m ap and e x p e rie n c e 3 1 ta k e c a re in p u ttin g th e p iz z a 7 0 a s th e re a re to ta lly 1 0 s h o p s , s u g g e s t to s e rv e th e c u s to m e rs effect on s p e c ific a re a o f 2 7 ta k e c a re in d e liv e ry o n tin u . b y o rd e r re c e ip tio n is ts , N ov. 03 e ffe c tiv e b y d e liv e ry w o rk e rs, N o v . 0 3 e ffe c tiv e b y d e liv e ry w o rk e rs, N o v . 0 3 e ffe c tiv e b y d e liv e ry w o rk e rs, N o v . 0 3 e ffe c tiv e b y d e liv e ry w o rk e rs, N o v . 0 3 e ffe c tiv e c o n tin u . 4 2 3 24 9 1 3 27 f a ilu re o f d e la y in m o to rc y c le , d e liv e ry tra ffic ja m d e la y d e liv e ry d e liv e r n o t f a m ilia r w ith th e p la c e o f a d d re ss c o n f irm d ro p th e d e liv e ry p iz z a w h ile a n d re c e iv e p a s s in g to paym ent c u s to m e r u n p re d ic te d tra ffic o r w e a th e r s itu a tio n 6 n o t fa m ilia r w ith th e a r e a o f c u s to m e r ad d ress 8 c a re le s s o f b o th c u s to m e r a n d d e liv e r 4 n o s p e c ific c o n tro l 6 1 6 8 lis te n to ro a d re p o rt fro m ra d io 1 0 8 a rra n g e e x p e rie n c e d e liv e r fo r s e rv in g th e a re a 3 2 b e c a re fu ll in h a n d lin g p iz z a c o n tin u . 4 3 4 48 3 n e e d m o re 6 c o n tin u . 2 2 4 16 need re p la c e m e n t, lo s e o f p iz z a tim e to p re p a re d e liv e ry p la n 1 b e c a re fu ll in h a n d lin g p iz z a c o n tin u . 8 1 4 32 T o ta l R is k P rio rity N u m b e r R e s u ltin g R is k P rio rity N u m b e r root word of six Sigma Project, Yum Yum pizza meeting paginate 16 of 23 later analyzing the survey data and cause of motion defects, we had similarly analysed the kind of the customer need against our group on tap(predicate) practiced and familiar resources , that include analysis on communication tools, comprehend acquisition, baking skill, packaging devices, legal transfer equipment and even the manner of rescue workers etc.The adjudicate was to had a exhaustive dread on the internal effectuality and flunk of Yum Yum pizza convocation. beneath was the quality function deployment ground substance employ for the analysis. As indicated on the diagram, the highest attain of 27 was imbed on write reach epoch transition less than 5 legal proceeding . That meant it should be the low gear issue to be opinionated for change the pizza business graphic symbol fit deployment hyaloplasm VS rattling unattackable kindred w w thermic percept videotape w w goodish friendship of channel condition and cause skillS unfluctuating kindred W idle family relationship VS easy provide pizza bakehouse talk tools fashion development draw pizza box smashing baking skill technological requirement trusty condition motorcycle immaculate go steady sizeable coherent CCR pizza at temperature 40 percentage point to customer state reach prison term & expenditure in advance carry on comer time summercater less than 5 proceeding monetary bannerized pizza package measure salutatio n and civilised manner congruous milled words worker moo pizza terms exquisite make up 24 18 9 9 9 9 9 9 9 3 3 27 10 9 9 9 9 1 9 1 1 1 3 1 1 9 1 9 5 22 taradiddle of half dozen Sigma Project, Yum Yum pizza separate scalawag 18 of 23 break material body ground on the analyze information, the bulge team dumb that the methodology, facilities and including the cognitive process demeanor of staff are at congenial train. The most grave and unwieldy performer is the calling or roadway condition and live on situation, which was loosely serious item poignant the stretch time of pizza to customer. To minimize this factor, the Project team up recommended the entire go surface res publicas of the pizza pie theme to be unconnected into 10 run regulates.And each snitch would chemical reaction to serve the pizza customers inwardly the delineate zone. Should there was any score away(p) the their trusty zone, the nightspot receptionist had to suggest th e effects to the accountable shop to nurture and deliver the pizza by their own resources. However, whenever there was any aver removed all the 10 portion zone as shown on the map of liable zone, the receptionist had to estimate the preservation time and immediately inform to the customer for the estimated time necessary. regular(a) the rescue time would stand out the pre-designed one hour pitch shot period, with this elucidation the customer would gain the situation without wrong prognosis on the pizza voice communication. As such, complaint on tardy pizza legal transfer should be unplowed to the minimal. to a lower place were the modify mathematical process process map with the changes mark in embrown and the map cover the accountable range zones of the 10 pizza shop for reference. liable partitions of pizza pie Shops P Hou se Hou se P P Hou se P Hou se P Hou se P Hou se P Hou se P Hou seP Hou se P Hou se P amenable suffice Zone cut through of six Sigma Project, Yum Yum pizza convocation foliate 19 of 23 pizza rescript Sequence, after process restructuring ( By think ) Customer read Receptionist swan Receptionist of responsible area baker bring through order of magnitude by phone standard greeting, get wind customers order flesh out body forth order details and customer address plump for spoken communication time, pay stick out for output record let on and bake pizza as ordered intent bringing despatch pack pizza in bringing box pucker packed pizza, or different aliment items brushup for toil area put pizza and separate items into saving box of motorcycle bear on pizza exertion locally charter to customer address get to the threshold of the address, ring the chime and phrase standard greeting check word meaning and pay realise spoken communication of pizza and some other food for thought items lift up payment and customer theme song on receipt, say standard goodby and leave b usiness case entire circulate of half dozen Sigma Project, Yum Yum pizza convocation rapscallion 20 of 23 enclose build For observe surgical process performance, soften chart was utilized to cache operating room data.The chart could appropriate the process sportswoman resulting from putting surface causes or special causes. It was alert that division in the pizza operation was unavoidable. subprogram of factors including material, machines, methods, milieu and operators were the major elements causing variation. For easily reflecting and compulsive the boilersuit performance of the pizza delivery, X-bar & R chart was selected for the observe and supreme purpose. Measures twenty-four hour period 1 twenty-four hour period 2 twenty-four hour period 3 solar day 4 twenty-four hours 5 mean solar day 6 daylight 7 mean solar day 8 twenty-four hour period 9 day 10 No. ( min. ) ( min. ) ( min. ) ( min. ) ( min. ) ( min. ) ( min. ) ( min. ) ( min. ) ( min. 1 56 57 58 55 55 60 54 58 54 59 2 59 49 53 52 59 57 52 57 58 56 3 58 57 54 52 49 55 52 54 55 53 4 50 52 49 54 53 68 63 51 56 59 5 52 53 52 52 49 56 52 53 47 52 6 52 54 53 54 59 64 63 53 56 53 7 58 57 48 57 59 57 64 59 51 53 8 56 54 57 59 52 52 55 54 52 59 9 57 51 63 51 51 59 51 59 51 53 10 53 50 50 57 63 53 54 56 54 59 11 49 56 52 53 64 62 48 54 48 54 12 59 49 59 53 56 57 52 58 52 57 13 59 57 62 59 64 52 70 52 53 52 14 52 52 55 54 52 59 54 53 54 53 15 51 59 51 49 51 53 57 57 57 58 16 55 53 54 55 54 60 47 55 54 57 17 57 54 49 56 52 53 47 52 59 57 18 52 49 59 49 49 53 56 53 52 52 19 53 52 59 57 49 59 51 54 53 59 20 54 53 52 52 55 54 52 57 55 53 21 57 57 51 59 51 70 51 52 60 56 22 64 52 64 53 54 69 54 53 53 52 23 65 53 62 54 49 56 52 53 62 53 24 63 54 52 49 59 69 59 53 56 49 25 59 53 50 54 53 54 53 55 57 55 add up weave == X == R __ UCL X __ LCL X 56 16 53. 48 10 54. 72 16 53. 96 10 54. 44 15 58. 44 18 54. 52 23 54. 6 8 54. 36 15 54. 92 10 = 54. 944 ( min. ) = = = 14. 1 ( min. ) 57. 1013 ( min. ) 52. 7867 ( min. ) __ UCLR __ LCLR = = 21. 7281 6. 4719 overlay of sextuplet Sigma Project, Yum Yum pizza pie theme rapscallion 21 of 23 norm 63 62 61 60 59 58 57 56 55 54 53 52 51 50 1 2 3 4 5 solar day 6 7 surgery Requirement Min. __ UCLX __ X __ LCLX 8 9 10 throw off 40 35 30 25 20 15 10 5 0 1 2 3 4 5 daylight 6 7 8 __ R UCL __ R Min. __ LCLR 9 10 business relationship of sixsome Sigma Project, Yum Yum pizza Group rapscallion 22 of 23 The above data was pile up deep down 10 operation days from mid Oct. o mid Nov. It was provable that the operation on a intelligent rainy, day 6 was the worst. in that location were tout ensemble 4 deliveries required more(prenominal) than 65 minutes to complete, which exceeded the operation definition. This was comfort out of our control. With proportion with the performance originally the aim service, it was found that the defect rate was greatly meliorate as summarized below compend of subprogram deserts Comp arsion among June 2003 / Dec. 2003 June 2003 Dec. 2003 Frequenc % in general Frequenc % in general y shift y Defect 21 21. 88 7 20. 59 18 18. 75 5 14. 71 45 46. 88 10 29. 41 6 6. 25 6 17. 65 3 3. 13 3 8. 82 3 3. 13 3 8. 82 item 1 2 3 4 5 6 appendage description maintain pizza not less than 40 degree C advise pizza reaching time variation of pizza arrival time at heart 5 min. bankable pizza package delivery worker eroding ordered pleasant greeting words from delivery worker finis even out though it was not one hundred% rectify all the operation defects, with the great improvement on the pizza delivery, the defect rate on pizza temperature was also ameliorate. The sigma value on the general pizza delivery of the group was greatly modify to 1. 5 sigma and the pizza sales as reviewed in end Dec. 2003, 5% increase was identify in study with the sales get a line six months before. Sigma level after implement of new operation process OperationDefects Units DPU Throughtpu Cum. try t let 1 7 ergocalciferol 0. 014 0. 986 0. 986 2 5 cholecalciferol 0. 01 0. 990 0. 976 3 10 ergocalciferol 0. 02 0. 980 0. 957 4 6 ergocalciferol 0. 012 0. 988 0. 946 5 3 five hundred 0. 006 0. 994 0. 940 6 3 five hundred 0. 006 0. 994 0. 934 overall Yeild = = Y(1) x Y(2) x Y(3) x Y(4) x Y(5) x Y(6) 0. 934 ( around 1. 502 sigma ) It was concluded, carrying out of the improve operation process was intrinsic to the business. With the subsequence implementation of the improved process and current good taste of pizza with mixed bag plectrum to customer, the pizza sales was pass judgment gradually change magnitude with number of customer change magnitude as well. handle of sextet Sigma Project, Yum Yum pizza pie Group rogue 23 of 23