5 Reasons Automation Quotes for the Same Job Differ

Scope lines that are easy to miss

Install and commissioning. Guarding and the risk assessment. Controls integration into your line. Operator training. Spare parts. Freight. Documentation. Each one can sit inside one quote and outside the other, and anything left out still has to be bought later. Ask each vendor for the same explicit list and the gap usually shrinks or explains itself.

Assumptions about your parts and your site

Every quote is priced against assumptions: parts arrive oriented or in bins, the floor has air and power where the cell needs it, your PLC (the line's controller) speaks a protocol the new system supports, changeover happens once a week or once an hour. When an assumption turns out wrong, the price moves after you've signed the order. The vendor who asked you more questions before quoting is usually the one whose number still holds at commissioning.

The record the system has to keep

Documentation and traceability requirements, common in medical, aerospace, and automotive work, add engineering that an identical-looking system without them doesn't carry. Two quotes can differ by the cost of proving the system does what it claims. If your project has that requirement, the quote that leaves it out is the one to question.

Headroom and growth

One vendor quoted the rate you asked for. Another quoted that rate plus room to grow: a bigger frame, a faster mechanism, capacity you may want in two years. Neither did anything wrong. Decide how much headroom you want before you compare the two.

What happens after commissioning

Support is part of the price whether or not it's on the quote. Local engineers who can be on your floor, spare parts availability, and who answers the phone in year three are real differences between vendors that a purchase-price comparison can't see. Ask where support comes from, and from whom.

When the cheaper quote is the right one

Sometimes the cheaper quote is simply the right one. When the scopes match and the assumptions hold, take it. This guide only argues for comparing projects before comparing numbers.