What to do when the RFQ arrives as a scanned PDF
An email arrives with one attachment. It is a scanned PDF of a print that was issued in 2014, photocopied at least twice, with a revision written in pen near the title block. It is due Friday and there is no model.
This is not an edge case. On a floor quoting to customer prints it is the most common package there is, and every tool that needs CAD is worth nothing against it. What follows is how to work a scanned PDF quickly and where the real risks sit. It is the case that decides how much of what AI can do for quoting you actually get to use.
What a scanned PDF actually loses
A scanned sheet is pixels, so everything that was data has become a picture of data. No text layer, no coordinates, no line geometry. Nothing can be measured, selected or copied, and any dimension you use has to be read by eye.
Resolution decides how much survives. A 300 dpi scan of a D size sheet is usually workable. A 150 dpi scan of the same sheet turns 3 millimetre text into a guess, and a photocopy of a photocopy loses the thin lines that carry the section marks.
The second loss is scale. A scanned drawing is not to scale, and a printed one usually is not either. Measuring off a scan to recover a dimension the drawing does not state is the single most common way a scanned print produces a wrong quote.
The third is colour and layering. Revision clouds, added notes and the original drawing all become one flat black image, so the visual cue that separates current from superseded information is gone.
A scan is a photograph of information.
The 6 checks to run in the first 5 minutes
Work the sheet in a fixed order and most of the risk surfaces immediately. These are the same 6 things whether the package is 1 sheet or 9, and they take longer to describe than to do.
Read the title block first. Part number, revision, material, scale, and the general tolerance note. Half the quoting errors on scanned prints come from a general tolerance nobody read, sitting in 8 point text in a corner.
Check the revision against anything written in pen. If a handwritten value disagrees with a printed one, that is a question for the customer rather than a judgement for you, and it takes an email that can be sent in the first 5 minutes instead of the last.
Find every note, including the ones on sheet 3 that apply to sheet 1. Notes carry finish, heat treat, marking and inspection requirements that are pure cost and appear nowhere in the geometry.
Then look for what is missing. A section view referenced and not present, a detail called out with no detail drawn, a GD&T frame referencing a datum that does not appear. Missing information on a scan is normal and each instance is either a question or an assumption you are writing down.
How to do the takeoff without measuring the picture
Use the stated dimensions and never scale off the image. If a dimension you need is not stated, it is either derivable from the ones that are, or it is a question. Those are the only 2 legitimate outcomes.
Derivable is more common than people expect. A stack of stated dimensions along one edge usually gives the overall, and a diameter plus a wall gives the bore. Work the arithmetic and write it beside the takeoff so the next person can check it.
For a part where the geometry drives the cost and the dimensions are incomplete, the honest answer is often that you cannot quote it accurately and should say so. A quote built on 4 assumed dimensions is a number with a tolerance of its own, and stating that tolerance is more professional than hiding it.
Where a tolerance stack-up matters, a scan is the worst possible input, because the tolerances are exactly the text most degraded by scanning. Read them twice, and if a digit is genuinely ambiguous, ask.
When to push back and ask for the native file
Ask early, ask specifically, and ask once. The request that works names the file you want rather than complaining about the one you have. A STEP for the geometry, or a vector PDF export of the same drawing, takes the customer 2 minutes if it exists.
Sometimes it does not exist. Plenty of legacy parts have no model and the scan genuinely is the master, which is worth knowing because it changes what you are quoting. A part with no model will need one built if it goes to production, and that is a cost somebody carries.
Do not let the request block the quote. Send it in the first hour, then work the scan while you wait. A quote that arrives late because you were waiting for a file loses to one that arrived with a stated assumption, which the whole argument about response time depends on.
The one case for holding is a part where the missing information changes the process rather than a dimension. If you cannot tell whether a feature is turned or milled, the routing is unknown and the number would be invented.
Ask in the first hour, quote anyway.
Making the next scan cheaper than this one
A scanned print you have worked once should never be worked from scratch again. The 40 minutes spent reading it produced a structured takeoff, a list of assumptions and a set of answers from the customer, and all 3 are reusable.
Keep them against the part number rather than against the quote. When the same print arrives 14 months later at a different volume, or as a revision that changed 2 dimensions, the work is a comparison rather than a fresh read.
That is also what makes a scanned print quotable quickly at all. The second time a part family appears, the general tolerance, the material condition and the finish notes are already known, and the only new work is what actually differs.
Floors that do this well end up with a private library that no vendor can supply, and it accumulates fastest on exactly the packages that software handles worst.
Work it once, keep it forever.
What to write on the quote
State the file you quoted from, the revision, and every assumption. A scanned print quote that does not name its source is unarguable in 6 months when the customer has moved to Rev D and expects the same price.
List the assumptions as a short block rather than burying them. Material condition, general tolerance applied, any dimension you derived, and anything you asked about and did not get an answer to before the deadline.
That block is protection and it is also a sales document. A buyer comparing 4 quotes, 3 of which are bare numbers, notices the one that says exactly what it assumed, and it signals a supplier who read the package rather than skimmed it. Reading the package properly is the habit this sits inside.
Then keep the marked-up scan with the quote. When the order lands 5 months later, the questions you asked and the answers you assumed are the difference between a smooth first article and an argument.