The white paper Manufacturing IT Infrastructure — Ready or Not for MES? asserts that many manufacturing execution systems (MES ) can keep data and applications available 99.9% of the time — but that’s not good enough to support an MES implementation . The argument is that 99.9% uptime equates to more than 8.7 hours of unplanned downtime per year for any application. Since MES solutions can act much like a line of dominoes, the availability of each component is crucial to the entire system: when one goes down, it takes the others with it. Re-setting can be time-consuming and may even require destroying everything currently on the line.
What are your views? Do you think 99.9% uptime is adequate for your MES solution?
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