No abstract

e-Procurement is a sound solution for companies to initiate e-business initiatives since it promises several distinct benefits, such as process cost and lead time reduction, improving strategic sourcing of commodities and enabling companies to negotiate better prices. Procurement is a broad term that touches on internal and external aspects of the company, complicating the decision to choose the most suitable e-procurement solution. An evaluation framework is proposed to assist in evaluating the susceptibility of a company's products to eprocurement and choosing the most suitable e-procurement solution. OPSOMMING e-Verkryging is 'n goeie beginpunt vir maatskappye om hulle aan e-besigheid bloot te stel aangesien dit verskeie voordele soos proseskoste en leitydvermindering, verbetering van strategiese aanskaffing van produkte en die vermoë om beter pryse met verskaffers te onderhandel, beloof. Verkryging is 'n breë term wat heelwat aspekte binne en buite die onderneming behels. Dit bemoeilik die besluit om die mees geskikte e-verkryging-oplossing te kies. 'n Evalueringsraamwerk word voorgestel ter ondersteuning van die evaluering van die ontvanklikheid van 'n onderneming se produkte vir e-verkryging en die keuse van die mees geskikte e-verkrygingoplossing.

A model of a perishable product inventory system operating in a random environment is studied. For the sake of simplicity, the stochastic environment is considered to alternate randomly over time between two states 0 and 1 according to an alternating renewal process. When the environment is in state k , the items in the inventory have a perishing rate k µ , the demand rate is k λ and the replenishment cost is k CR. Assuming instantaneous replenishment at the epoch of the first demand after the stock-out and associating a Markov renewal process with the inventory system, the stationary distribution of the inventory level and the performance of various measures of the system evolution are obtained. Numerical examples illustrate the results obtained. OPSOMMING 'n Model van 'n voorraadsisteem van 'n bederfbare produk wat aangehou word in 'n toevalsomgewing word voorgehou. Die stogastiese omgewing word vir doeleindes van vereenvoudiging beskryf deur twee toestande, nul en een, wat op toevalswyse die wisselende hernuwingsproses behandel. Wanneer die omgewing in toestand k is, is die bederftempo k µ , die vraagtempo k λ , en die aanvullingskoste k CR. As aanvulling oombliklik plaasvind na vooraaduitputting en Markov-hernuwings geassosieer word met die voorraadsisteem, word die stasionêre verdeling van voorraadvlak en ander prestasiemaatstawe van die sisteem verkry. 'n Numeriese voorbeeld ondersteun die resultate wat verkry is.

Supply planning and traffic flow planning are major activities in the automotive manufacturing environment worldwide. Traditionally, the impact of supply planning strategies on plant traffic is rarely considered. This paper describes the development of a Decision Support System (DSS) that will assist automotive manufacturers to analyse the effect of supply planning decisions on plant traffic during the supply planning phase of their logistics planning process. In essence, this DSS consists of a Supply Medium Decision Support Tool (SMDST) (an interactive MS-Excel model with Visual Basic interfacing) and a traffic flow simulation model tool (using eMPlant simulation software). OPSOMMINGVerskaffingsbeplanning en verkeersvloeibeplanning is belangrike aktiwiteite in die motorvervaardigingsbedryf wêreldwyd. Tradisioneel word die uitwerking van verskaffings-beplanningsstrategië op aanlegverkeer selde in ag geneem. Hierdie artikel beskryf die ontwikkeling van 'n Besluitnemings Ondersteuningstelsel (DSS) wat motorvervaardigers sal ondersteun in die analise van die effek van verskaffingsbeplanningbesluite op aanlegverkeer tydens die verskaffingsbeplanningsfase van hulle logistieke beplanningsproses. Hierdie DSS bestaan hoofsaaklik uit 'n Verskaffings-vervoermiddel Besluitnemingshulpmiddel (SMDST) ('n interaktiewe MS-Excel model met "Visual Basic" koppelling) asook 'n simulasiemodel van verkeersvloei (met eM-Plant simulasiesagteware).