How do you calculate shaker table utilization?

Divide booked test hours by available hours and multiply by 100. With 142 hours booked out of 168 available, utilization is 142 / 168 = 84.5%.

What is a good utilization target for a vibration test lab?

Most test labs aim for 80-90%. Above that you lose flexibility for rush jobs, and below it the rig is underused. The example's 84.5% sits right in the healthy band.

What does available shaker time include?

The hours the rig is staffed and operational in the period, after planned maintenance is removed. A single shift over seven days is the 168 hours used here.

Why is my utilization high but throughput low?

Booked hours count fixture setup, abort and re-run time, not just productive shaking. High utilization with low completed-test counts points to long changeovers rather than real demand.

Should I add a second shaker when utilization is over 85%?

Sustained utilization above 85-90% with a growing backlog is the usual trigger. A single busy week like 84.5% is not enough; look for a persistent trend before committing capital.

What does the gap to target tell me?

It is target minus actual. Here 85% - 84.5% = 0.48 points, meaning you are just under target and essentially at capacity for the week.

Acoustic, Noise, Vibration & NVH Products calculator

Shaker Table Utilization Calculator

Shaker table utilization is the percentage of available vibration-rig hours that are actually booked for testing. NVH labs and durability test houses watch it because electrodynamic and hydraulic shakers are capital-heavy assets, and idle time on a six-figure rig is money left on the table, while running flat-out means you cannot absorb a rush program. Test managers use this metric to justify a second shaker, schedule preventive maintenance windows, and quote realistic lead times to engineering. It is the single clearest signal of whether your vibration lab is a bottleneck or has slack.

What this calculator does

Calculate booked shaker table time as a percent of available lab time and compare against a utilization target.
a vibration lab manager needs to know whether a shaker table schedule is overbooked or underused
It divides booked shaker hours by available shaker hours to give a utilization percentage, then compares it to your target.

Formula used

Shaker utilization = booked shaker time ÷ available shaker time
Gap to target = target utilization - shaker utilization

Inputs explained

Booked shaker time:
Available shaker time:
Target utilization:

How to use the result

Use it weekly or per scheduling cycle to decide on overtime, maintenance windows, or adding rig capacity.
Booked hours are not the same as productive hours, so setup, fixture changes and aborted runs can make a high utilization look busier than it is valuable.

Current U.S. benchmarks

As of May 2026, U.S. manufacturing runs at 75.6% of capacity (Federal Reserve via FRED), up 0.2 points from a year earlier. Enter your own plant's utilization; the national figure is a reference point for how loaded the industry is.

Common questions

How do you calculate shaker table utilization? Divide booked test hours by available hours and multiply by 100. With 142 hours booked out of 168 available, utilization is 142 / 168 = 84.5%.
What is a good utilization target for a vibration test lab? Most test labs aim for 80-90%. Above that you lose flexibility for rush jobs, and below it the rig is underused. The example's 84.5% sits right in the healthy band.
What does available shaker time include? The hours the rig is staffed and operational in the period, after planned maintenance is removed. A single shift over seven days is the 168 hours used here.
Why is my utilization high but throughput low? Booked hours count fixture setup, abort and re-run time, not just productive shaking. High utilization with low completed-test counts points to long changeovers rather than real demand.
Should I add a second shaker when utilization is over 85%? Sustained utilization above 85-90% with a growing backlog is the usual trigger. A single busy week like 84.5% is not enough; look for a persistent trend before committing capital.

Last reviewed 2026-05-12.