Make or Buy Volume Where Building the Module Beats Buying It
Building discrete sensor layouts beats buying pre-tested modules when batch volume crosses twenty-five thousand units and host routing absorbs test NRE without HDI layer additions.
SMT Line Setup Fee
NRE Expense
Non-recurring engineering charges cover the preparation and configuration of assembly equipment before a manufacturing run begins. Charging an smt line setup fee accounts for the time spent programming the pick and place machines and configuring the stencil printers. This fee is independent of the number of boards produced and represents the initial barrier to starting a production run.
Labor Cost
Machine adjustment requires skilled technicians to load feeders and install stencils on the assembly line. Because a production line is idle during this transition, the smt line setup fee compensates the manufacturer for lost output and technical labor. The task must be repeated whenever a new board design or a different revision is loaded.
Volume Amortization
Small production batches suffer from a high per-board cost because the setup charge is distributed over only a few finished assemblies. When production scales to thousands of units, the smt line setup fee becomes negligible on a unit basis. This economic reality drives prototype runs to use simplified manual assembly or multi-project panels that share tooling costs.
Billing Limit
Most contract manufacturers waive the charge entirely once a purchase order exceeds a designated volume threshold. This policy incentivizes customers to consolidate their orders into larger, less frequent production runs.