Title of article :
Development of a Novel Lot-sizing Model with Variable Lead Time in Supply Chain Environment
قلي پور مجتبي نويسنده , مصطفايي پور علي نويسنده , كومار جيتندرا نويسنده Instructor, Mechanical Engineering Department, MNNIT, Allahabad, India Kumar Jitendra , رويي نيرجهار نويسنده Professor, Mechanical Engineering Department, MNNIT, Allahabad, India Roy Nirjhar
Supply chain management (SCM) addresses the management of materials and information across the entire chain from suppliers to
producers, distributors, retailers, and customers. The theory of supply chain management suggests that lead time reduction is the
pioneer of using market mediation to reduce transaction uncertainty in the chain, which can be conceptualized as the primary goal of supply
chain management. In the past few decades, scholars have had to place attention on the impact of inventory on SCM. This paper is related
to the development of a lot-sizing model for a single-component multiple-delivery system with variable demand and lead time of a
multinational transformer company. Two models were developed. For the first model, distribution of demand is considered as normal,
distribution of procurement lead time is exponential, and the quantity is coming in a single lot. For the second model, distribution of
demand is normal, and procurement and administrative delay lead time is exponential, and the quantity is coming in a single lot.
Modification of the first model has been incorporated by taking the effect of multiple deliveries on the models and correcting the Re-order
point as obtained from the previous models. The results and analysis by the second model have been done for different parametric
conditions. The effect of multiple deliveries is also taken into account. The optimum re-order point and economic ordering quantity with
various different inputs have been discussed.