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Fig. 5-Work schedule BI-WEEKLY' MAINTENA NO. Work Description M J O ~' W 0 TG M FI E P R M 7 T 8 W 9 T •io F !! S !z 1 T57Manlaadi»gs~rf 0038 a M l50 50 MucK sKtV ~soo Z ZsTl3•gCable"zslw(f o/ob 8 E 2U 7z SH cTC EW iz~3o 3~3 3 Tht P.1J0s provide management with current data un the backlog of major work. When completed, they provide a history of lob costs. Component and unit coats are summ;uiztd by deparUnent in a monthly report that :dsu shiny, }ear-ro-date cost; (fig. ?). Mamigement"s obleclice is to comrol maimenanec work to minimize ewes and tywpment dowmimc. Tht managers abo want to know how much labor is used for Pp1, emergency work, overhauls and replncemtnh, or construction projects. Labor data is broken down inw total Noun. u+trtimc, and absenteeism. Efl"wive sched- uling is postblc ante when inspection and PM reduce emergrncy work to a minimum. Henderwn management has lea rnrd lu keep a close eye un eooxructiun. modifi- cations and installation work-activitizs that tend m use up maintenmtce resource on nunmuinttn^nee actiyitia. Computer temm~als in the form of cathode-ra}-tube ICRT) screens are located on the surlace and in the main underground .hop. They displa} current infonna- tiun ~n the smtuo ul M.IOs, PM service rtquirentcnts, and lire work. The information ner.cork insures Ihat scheduled maintenance work is done at a time when ii makes mutt clTecuvc use of maintenaace rcxwrces and causes least di+nrptinn of production ,dtedules. How work is scheduled Once a specific maintena nee job fur a unit of mobile tyuipment is identified, the information is rctordtd on the fcrcead sheet IFig. 3). As details of the required maintenance work bctomc available, an MJO is opened and x tentative schedule of the wur4. is proposed. This information becomes part ul the f`110 .talus report, wcekh~ h,ting ul major mainttn:uicc jobs currcnth~ planned (Fig. a) Schtduling wettings ore held wceklp, attended b}' Ihost invnh~ed in muimcnance planning and chaired br the mine ;uperintendtnt. The ubJective of the scheduling meetings is to eroure agreement between maintenance ;utd production atatTs on the priority of work to be ~; performed. \\'hcn a schedule has been drawn up (Fig. ~), renuurce acaiht bilin~ i, checked, and the schedule is approved by the mine superintendent. R'htn work specified by an N1J0 is completed, all relevant data are trano-lerred to the MJO history report. This reference lilt is used for review by management, for trouble-showing in rtpttitice work, and for highlighting trends PM reduces unscheduled work Hendtrson's PM program is based un regular, ~periudit irnpeetion and sen•icing of production equipment. "Fhe ubjcetive of IT1 inspection is to detect serious tyuipment problems before breakdown oecure, Early detection keeps repairs to a mtnimum, and when nutJor work is regwrtd, it pro+idrs the lead lime needed fur good job planning. The result i, to reduce repair costs and produo lion losses. PM sen~ict intervals are detennintd b} cla pled oper- ating hours. The number ul elapsed operating hours a ppca rs on the CRT strecn, and the maintcna nee clerk pcriudiailly rocic+es the strcen to set which units art due fur servicing. As Ptvl inspcttiuns improved at Hcndenon and timely rcpain were mode, manpower requirements for unscheduled and untergency work were reduced, and manpower ;dloca fed to scheduled work increased. Tht eticetivcness ul PM sen~ices can be vcrifled by reviewing repair-history data projected on the CRT screen ur by rclerring to a mumhly repair-history report that shows the elapxd operating time for components. listed by serial numbers It is possible to spot improce- ments ^ttribu(ablt u> the PM programs. Control is the name of the game Fflbetivt management requires accurate inform:uion and gaud control over maino.nanx resources-espe- cialh la bur. An essential clement of labor Control is gaud training, which i, oided at Hendenun bs the use of video NCE PLANNING Week z3