JIT Supply Chain Resilience: How to Add Flexibility to the JIT Model and Maximize Uptime

Since the 1970s, the world has placed its trust in JIT manufacturing. Under optimal conditions, this model is efficient, minimizing excess overhead by only producing levels of inventory required to meet customer demand.

As the efficiency of JIT production brought this philosophy into widespread practice across factories around the globe, most manufacturers have modeled their supply chain management strategies with a JIT supply chain approach — meaning they only order materials and other components from upstream suppliers right before they’re needed, while ordering little (if any) more than the precise amount needed at that time.

Prior to 2020, JIT supply chains were more simple to manage. While disruptive events still occurred, they were typically more predictable in scale, easier to contain at these lesser magnitudes. As a result, traditional risk management frameworks were sufficient mitigation.

While manufacturers historically managed supply chain disruptions through comprehensive risk mitigation plans, theoretical ‘resilience’ of these supply chains has been built on the assumptions that manufacturers can accurately track, predict, and plan around large-scale geopolitical shifts far beyond their control. In modern supply chains — with countless variables and overlapping dependencies — that’s just not possible. A disruptive event at any single point in these interconnected webs can have unpredictable rippling effects that ultimately lead to the terminal failure of numerous other supply chains.

In the new status quo of uncertainty, the JIT supply chain model has been vulnerable to these disruptions. JIT production relies on lean inventories and precise coordination between suppliers and manufacturers. When the impacts of disruptions cascade across entire supplier ecosystems, solutions aren’t as simple as having straightforward contingency plans. Without large stocks of inventory to fall back on — or fast and versatile production available at the point of need — these factory floors are susceptible to extended periods of costly downtime. A single replacement part, which can take months to get, can shut down an entire production line until it’s received.

Constantly re-evaluating supply networks is not a bulletproof solution. Not only does identifying and integrating new suppliers into existing systems take valuable time and resources; but the higher frequency of disruptive events makes the perpetual re-planning of complex, interconnected manufacturing supply chains unviable as a long-term strategy.

Manufacturers looking for a more reliable buffer against disruptions to factory floor operations therefore need to shift their approaches to supply chains into a more agile and flexible strategy. So what can manufacturers do to acquire crucial replacement parts without jeopardizing production uptime with uncertainty and unnecessarily long lead times?

As federal initiatives like AM Forward highlight the transformational value of cutting-edge technologies like additive manufacturing in supply chain management, growing numbers of organizations have brought industrial 3D printing to their factory floors to bolster operations.

Modern additive manufacturing technology is able to quickly produce production-grade parts in metal-strength composites and a wide variety of industrial metals. When problems arise, technicians can quickly and easily print solutions they need now on factory floors — tooling and fixtures, MRO equipment, ergonomic solutions, or any other critical production components — without prolonged downtime.

Production at the point of need through industrial 3D printing provides supply chain resilience to manufacturers in several ways:

1. Reduced dependency on traditional suppliers: AM enables manufacturers to produce parts and components in-house, reducing their reliance on external suppliers. If there are disruptions to existing supply chains, staff on the factory floor are empowered to take matters into their own hands by designing and 3D printing a solution.

2. On-demand production: With 3D printing, manufacturers can produce items on-demand, eliminating the need for large inventories and minimizing the risk of excess stock.

3. Digital inventory: This allows parts to be stored in the cloud as 3D design files, which can then be turned into tangible objects in a matter of hours. This flexibility allows manufacturers to respond quickly to changes in demand or unexpected disruptions in the supply chain.
   
   With today’s more sophisticated 3D printing software platforms, large industrial manufacturers like Vestas are using secure digital inventories to store certified, up-to-spec parts that can be easily searched for and printed to wherever they’re needed. A secure, shared repository of up-to-spec part files allows their transfer without risking design inconsistencies or risking an intellectual property leak.

4. Localization of production: 3D printing lets manufacturers establish production facilities closer to customers. This localization reduces transportation costs, lead times, and mitigates the impact of potential disruptions associated with long-distance shipping.

5. Spare parts availability: 3D printing can address the challenge of spare parts availability, especially for older or discontinued parts. Instead of relying on the availability of spare parts from suppliers and working with their timelines, manufacturers can produce the required parts on-demand using 3D printing, reducing any factory floor downtime.

6. Distributed manufacturing networks: 3D printing enables the establishment of distributed manufacturing networks where multiple facilities can collaborate and share production capacities. In the event of a disruption in one location, production can be shifted to other facilities within the network, ensuring continuity and reducing the impact of supply chain disruptions.

For today’s state of uncertainty, Markforged has engineered a suite of uniquely powerful 3D printers and software tools to maximize the value manufacturers can generate from their JIT supply chains.

Able to produce composite parts as strong as aluminum, Markforged 3D printers are an ideal solution for a wide range of industrial applications. The unique strength and performance of Markforged parts due to patented continuous fiber reinforcement (CFR) technology, Markforged composite 3D printers makes it far more fast, simple, and cost-effective to produce strong tooling, fixtures, and customized production components.

When parts must be made out of metal, the Metal X system provides the most simple and accessible way to fabricate low-volumes of metal parts. For higher throughputs of production-grade parts, Markforged offers the FX20 large-format printer for massive composite parts, and the PX100 metal binder jetting system for precision parts in high volumes.

Cashco Inc. uses Markforged composite 3D printers to print custom tooling for the factory floor. This brought the time to manufacture tooling down by 70% — while reducing the need for metal tooling work by 90%, offloading internal machinist bandwidth for revenue-generating parts.

Vestas, a global leader in wind energy, stores over 2000 parts as cloud-based digital inventory through Markforged Eiger software. Employees at any Vestas location can quickly search for and 3D print any up-to-spec parts for qualified applications. With its distributed manufacturing model, Vestas can get parts on a moment’s notice anywhere in the world, in just hours.

KST Moschkau turned to additive on the Digital Forge when low-quantity orders for Aluminum components became expensive and often created delays with long lead times. 3D printing prototypes and final production parts for a security camera mount cut lead times down from 3-4 weeks down to just 2 days; with production costs just ⅙ of what they previously were.