Why is piece count the driver rather than area?

The work is handling, and handling is per piece. Picking up a one-square-foot patch and a ten-square-foot one takes almost the same time. Area drives material cost; it does not predict assembly labor.

How much can consolidation really save?

The saving per piece, times the pieces removed, on every batch for the life of the part. Going from seven pieces to four on a sixty-unit batch saves about a thousand dollars per batch with no material change.

Does this work for automated assembly?

Not well. An automated cell has a cycle time largely independent of piece count and a large fixed cost this page has no input for. The per-piece model describes manual assembly.

Are fasteners really worth counting?

Yes, and they are the pieces most often left out. A screw takes as long to position as a foam block, sometimes longer. An assembly with twelve fasteners is a sixteen-piece assembly for costing.

Acoustic, Noise, Vibration & NVH Products calculator

Acoustic Assembly Labor Cost Calculator (Part Count)

Cost the labor in an acoustic assembly from the number of separate pieces somebody handles. Enter batch size, pieces per assembly, handling time and the burdened rate; the page returns the batch cost and the saving per piece removed.

What this calculator does

Cost acoustic assembly labor from the pieces handled, and price what designing one of them out is worth.

Formula used

Pieces handled = assemblies in the batch × pieces per assembly
Labor hours = pieces handled × handling time per piece ÷ 60
Batch labor cost = labor hours × burdened rate
Cost per assembly = batch cost ÷ assemblies; cost per piece = batch cost ÷ pieces handled
Saving per piece designed out = assemblies × handling time ÷ 60 × burdened rate

Inputs explained

Assemblies in the Batch: How many finished acoustic assemblies the run produces.
Pieces per Assembly: Separate pieces placed by hand, fasteners included.
Handling Time per Piece: Pick, position, press and check for one piece, averaged.
Burdened Labor Rate: Fully burdened rate: wages, benefits and allocated overhead.

How to use the result

Best suited to pricing an acoustic assembly for a quote, putting a number on part consolidation, comparing a pre-assembled kit against loose pieces.
Labor only; material, adhesive, tooling and freight are elsewhere. Does not model cure or dwell time, which does not fall when pieces are combined. Ignores the learning curve: a first batch of a new part costs more than this.

Current U.S. benchmarks

As of Sep 2026, average hourly earnings in U.S. manufacturing are $30.21 (BLS), up 3.4% from a year earlier. Burdened shop rates typically run 1.3 to 1.8 times earnings once benefits and overhead are loaded.

Common questions

Why is piece count the driver rather than area? The work is handling, and handling is per piece. Picking up a one-square-foot patch and a ten-square-foot one takes almost the same time. Area drives material cost; it does not predict assembly labor.
How much can consolidation really save? The saving per piece, times the pieces removed, on every batch for the life of the part. Going from seven pieces to four on a sixty-unit batch saves about a thousand dollars per batch with no material change.
Does this work for automated assembly? Not well. An automated cell has a cycle time largely independent of piece count and a large fixed cost this page has no input for. The per-piece model describes manual assembly.
Are fasteners really worth counting? Yes, and they are the pieces most often left out. A screw takes as long to position as a foam block, sometimes longer. An assembly with twelve fasteners is a sixteen-piece assembly for costing.

Last reviewed 2026-10-02.