In an earlier job, I was the materials manager in a manufacturing facility. A “tool crib” was the repository for office supplies and safety supplies; the bulk of the maintenance, repair, and operations (MRO) inventory was controlled by the maintenance department and was stocked all over the plant. My group set out to bring best practice in inventory management to the MRO supply chain.
Fasteners were the first MRO component category that we addressed. We selected a supplier to come in and regularly replenish the fasteners in a central stocking area. The supplier inventoried and stocked the bins and invoiced us monthly. This simple process change eliminated the multitude of purchase orders and the associated costs that had been typical of the previous arrangement; it was also designed to ensure that maintenance staff always knew where to get the fasteners they needed for their tasks.
However, there was continued resistance to the idea of the materials management function taking control of all MRO supply. The turning point came when the stock of foundry tapping cones—used to control the flow of molten metal from a furnace ladle—was allowed to run out and the purchasing team had to source and expedite replenishment on a Sunday. It became clear to everyone that it made more business sense to stock foundry supplies in the tool crib. Soon after, additional supplies of tapping cones were moved into the crib. Not only were MRO centrally maintained and ordered after that, but the foundry maintenance area’s housekeeping improved because there were no longer skids of materials sitting around as “maintenance stuff.”
As this scenario demonstrates, it is possible to streamline MRO inventory management practices and produce significant benefits for the organization as a result. This article will address several of the basic steps that organizations can take to improve their MRO supply chain activities.
First of all, let’s be clear about what we mean by “MRO supplies.” We are talking about supplies consumed in the production process but which do not become part of the end product or are not central to the organization’s saleable output.1 That definition includes items such as repair components, cutting fluids, lubricants, and tooling as well as office supplies, cleaning and other janitorial products, furniture, lighting fixtures, building supplies, safety supplies, and other consumables that are not tied directly to the organization’s core products or services.
The spend on MRO inventory can be very substantial. Just two examples: The Helicopter Association International’s annual survey of operating performance shows that 40 percent to 45 percent of expenditures are maintenance-related.2 And at a Tier One automotive supplier, approximately 40 percent of the annual procurement expenditure is consumed by MRO materials. As companies continue to do battle on the cost front, few see the likelihood of MRO spend falling. A recent survey showed that nearly 60 percent of manufacturing industry managers surveyed expect to maintain their levels of MRO spend.
Unfortunately, though, MRO supply is often overlooked as an “inventory” responsibility; as a consequence, it is rarely handled with the rigor and attention that it should be. It is all the more regrettable in 2013, and all the more crucial for organizations to understand and manage their costs, given the many uncertainties and the volatility of the global economy. Yet in my experience, MRO supply activities have little direct accountability, and are driven too often by stockouts rather than to any overarching supply chain plan. Frequently, I have seen situations where MRO inventory is expensed and sits in an area without any identifiable locator system, ID, or a usage history. Although more companies are coming round to the view that MRO supplies are true costs that can be tracked and controlled, clearly there is room for systematic control and more efficient methods of handling.
Traditional inventory management—covering raw material, component parts, work in process (WIP), and finished goods—is controlled and managed to optimal levels, providing enough supply to cover current production needs and allow for the most probable contingencies. The inventory is generally checked through a process known as cycle counting, using ABC analysis costing. The inventory is received and located in a warehouse or WIP location and decremented as it is used. When an enterprise resource planning (ERP) system is utilized, the inventory may be replenished through a reorder advisement through MRP or through a kanban type of system where the supplier or vendor is notified and the inventory is replenished. Bills of materials are kept for the end products; they detail the amount and costs of the inventory. There is never an issue of senior management doing an end run around the system to expedite the process; that would hurt everything from back flushing to inventory accuracy, and many other key performance indicators.
However, MRO inventory often lacks most of these controls or practices. It is very rarely measured in terms of inventory on-hand, turns, obsolescence, or usage. It generally turns less than once a year; request-to-fill rates are usually less than 80 percent.3 Frequently, many of the supplies required for MRO tasks are actually in stock but they just cannot be located. Another performance shortfall: many of the items required for maintenance or repairs are obtained with spot buys that ignore price in favor of availability. Even worse: expedited freight becomes a factor as well. There is also the cost of unplanned downtime, waiting for repair components that might already be somewhere in the facility.
At the same time, there is the issue of diverting highly paid maintenance personnel from repairs and planned maintenance activities. Having them carry out materials management work is not the best use of their skills and time. I’ve heard more than one plant manager complaining about maintenance staff sitting in an office talking to vendors, and in the same breath, groaning about equipment downtime.
There are also big differences in management of cash flow when we compare traditional inventory management practices with what is still typical with MRO. It is not uncommon for a maintenance manager to attempt to “save money” by buying larger quantities of, say, machinery components in order to get the price break. But that generally means a large cash outlay for inventory that is expensed when received rather than being on the books—and which may get lost or become obsolete. On the production side, supply chain professionals facing similar volume issues will handle the negotiations allowed for receiving the volume discounts, but will usually split the deliveries into multiple dates, thus lessening the expense impact, reducing the amount of shelf space required for stock, and allowing for order cancellation in the event that the items are no longer required.
Another common MRO practice is the use of “hidden” or “private” inventories of material that individuals keep in order to insure they have the items when they need them. The material may be in tool boxes, shelves, or hidden in work closets. This squirreled away inventory comes at some considerable cost to the organization—everything from the obvious excess inventory to expedited freight fees.4
I have participated in several plant clean-ups where large areas have been reorganized and material has been disposed of because the equipment it was purchased for no longer exists or more commonly, no one remembers why the material was purchased in the first place. In the same facilities, I have seen parts expedited for an emergency repair job, only to have the second-shift maintenance person perform the repair with the parts already in his tool box. Another example: in one Tier One automotive facility, we had machining bits that were stocked on an honor system. One day, there were no bits on hand and nothing on order. While purchasers made frantic calls, operations people made plans to extend the usage of the remaining bits. It was assumed that the operations would suffer within 12 hours. As it turned out, there was enough stock in operators’ tool boxes to run the operation for more than 48 hours without doing any of the gymnastics required to extend the operating life of each bit.
There is a bit of a “Superman complex” on display in such circumstances; the employee saves the day because he has the right parts right there.
So what are the hallmarks of good MRO inventory management? In my experience, there are five aspects that constitute best practice:
I don’t pretend that reorganization of MRO inventory activities is a snap-of-the-fingers exercise—something that is “one and done” with a simple e-mail from top management. There are many cultural imperatives that sustain the status quo, not least of which are the defense of turf by managers and heel-dragging by the many who fear loss of control and the many more who are distrustful of any different ways of doing things because they want proof that the new way will be that much better.
Change has to start somewhere. The best place to begin is with data showing how subpar MRO activities actually are when compared with inventory management norms. It can be a real eye-opener for senior management to review the annual maintenance expenditures on parts or to see the costs of expedited freight charged to maintenance. These two items alone may be enough for top management to begin asking questions. And with senior executives engaged, real change can start to happen.
As noted earlier, one of the easiest areas to begin an MRO inventory overhaul is with fasteners—ubiquitous, low-cost components whose mainstream supply chain processes are very mature. Many leading suppliers of fasteners offer very advantageous VMI programs. Once such processes are in place for fasteners, it is a fairly easy step to start moving other simple maintenance supplies into a tool crib or some other method of inventory control. Another simple and practical method is the use of vending machines to dispense basic supplies. The machines feature a code that is keyed in—work order number or employee number, for instance—or they accept the employees’ ID when they swipe their ID card.
MRO efficiencies are within sight. In fact, they have been so for decades. No high-level meetings, no large-scale consulting programs, and no management task forces are needed to justify the savings that can be realized. I hope that this article gives you some of the impetus that your organization may need to get its MRO
supply chain operating to its full potential.
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