Vendor Managed Inventory: Benefits of a Transit Supply Chain Network Realized

Posted on June 15, 2012 by Naeem Farooqi

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On Nov. 7, 2011, Metrolinx awarded North America’s largest Vendor Managed Inventory (VMI) consortium contract for the parts management of more than 1,700 transit vehicles to Pennsylvania-based Neopart LLC. This article, the third in a series, will outline the benefits and challenges faced under a VMI supply chain in Southern Ontario, Canada.

In previous articles [METRO Magazine: February/March 2012; May 2012], I detailed the costly and disconnected state of materials management across Southern Ontario’s transit bus operators. To rectify this issue, I discussed how a business case was developed to consolidate and shift the risk of parts availability onto specialists in transit part sourcing and delivery. Upon obtaining stakeholder approval and conducting a rigorous procurement process, Metrolinx and eight participating transit systems, in partnership with Neopart LLC, commenced their journey into VMI in late 2011.

Develop performance indicators
To support the introduction of VMI, Metrolinx and eight participating transit systems recognized the importance of building a strong baseline and key performance indicator (KPI) system to track the expected success and improvement of the VMI project. Developing KPIs is critical to ensuring vendor performance can be measured for purposes of contract management, which has not been the case in a number of other VMI projects. As well, the ability to measure savings and improvements was foreseen to be of interest to the municipal councils and boards that transit systems are accountable to.

As such, one of the first deliverables of the project’s Steering Committee was to retain the services of a supply chain consultant to develop the KPIs. A joint database was developed by importing 200,000 line items from participants with SKUs, usage and prices dating back one year. Thirteen KPIs were adopted and automated to generate monthly status reports. The primary KPI to measure the vendor’s performance was the ability to obtain a perfect order within a target range of 96%.  

After consolidating the data, it was determined that 44,500 SKUs existed in the eight-member consortium for more than 26 vehicle models, ranging from cutaways to 60-foot buses. Of note was the magnitude of the aftermarket parts supplier base with 380 vendors involved in the supply chain servicing the needs of the eight transit systems. At the time, the single largest supplier group was comprised of 194 distributors followed by 75 OEMS, 36 consumable material companies and seven bus manufacturers.  

Neopart began an extensive process of cross-referencing the parts, as mentioned in previous articles. This consumed a considerable amount of transit staff resources, as stockkeepers were required to provide support in tracking core part manufacturers. Ray Melleady, Neopart’s project lead, refers to this as peeling the layers of the onion. The benefits of carrying out the cross-reference along with identifying the mean-failure-rate-per-unit installed has allowed Metrolinx and Neopart to develop a lifecycle cost for a specific part SKU, thereby providing an estimate of its total dollar value over time.

Moreover, as part of its baseline KPI development, Metrolinx examined the last point of shipment distance and carbon footprint of the existing material management process. After investigating over 10,717 packing slips for 12 transit garage locations and cross-referencing supplier addresses, it was discovered that the average distance traveled per part was 283 miles. As part of its implementation plan, Neopart established a hub-and-spoke distribution center in Mississauga, Ontario to service all facilities with three trucks. This allowed the last point of shipment to decrease to 40 miles, on average. Furthermore, consolidated daily shipping translated into 3,240 unique deliveries across the consortium, which meant a reduction of 86% in CO2 emissions. Overall, this means that stockkeeper processing time for deliveries could be reallocated to other productive tasks. Another green initiative introduced by Neopart was a pallet recycling program, with trucks picking up previous day pallets to be reused in shipping.

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