Purchasing directors: How do you build a 'critical parts graveyard' inventory strategy for legacy Mitsubishi PLCs when management keeps pushing for just-in-time inventory reduction?

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Hey fellow purchasing director - I feel your pain! Balancing legacy PLC support with JIT pressure is a classic manufacturing dilemma. Here's how I approach building that 'critical parts graveyard' strategy for legacy Mitsubishi PLCs:

First, I frame it as risk management, not just inventory. Legacy Mitsubishi PLCs have unpredictable lead times (8-16 weeks for some modules) and discontinued parts. A single failure could mean weeks of downtime. I present data showing the cost of production stoppage versus carrying costs for critical spares.

I categorize parts by criticality: which PLCs run essential equipment? For those, I build strategic buffer stocks based on usage history and lead times. For less critical parts, I use JIT. This hybrid approach shows management I'm not hoarding everything.

I partner with specialized distributors like Industrial Automation Co. that stock legacy and refurbished Mitsubishi parts. They offer cross-brand replacements too - sometimes a Siemens module can replace an obsolete Mitsubishi part. This reduces the 'graveyard' size while maintaining resilience.

I track Mitsubishi's legacy product announcements religiously and buy strategic quantities before discontinuation. I also keep backup units on-site for the most critical systems.

The key is showing management that for legacy equipment, 'just-in-time' often becomes 'just-too-late.' A targeted graveyard strategy prevents catastrophic downtime while keeping overall inventory lean. It's about smart buffers, not blanket stockpiling!

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Purchasing directors: How do you build a 'critical parts graveyard' inventory strategy for legacy Mitsubishi PLCs when management keeps pushing for just-in-time inventory reduction?

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