How to read your NCEES diagnostic report

Report format, results timing and retake limits are NCEES's and your licensing board's to set. The facts below come from the NCEES Examinee Guide (May 2026) and NCEES's sample diagnostic report; confirm anything you plan around with NCEES.

A PE result arrives as one word. If the word is "fail", NCEES attaches a chart, and that chart is everything you will ever be told about the attempt. It is worth ten careful minutes, because most people read it wrong in the same two or three ways, and then build a retake around the misreading.

In short:

• The dashed line is not the passing score. It is the average of the people who passed.
• The report cannot tell you how close you were. NCEES designed it that way and says so.
• It can tell you where to spend your hours, if you weigh each area by how many questions it carries and not only by how far behind you were.
• It can't tell you why you lost the points. That part you find out with a pencil.

What the report shows

The report is the same design for every computer-based NCEES exam, so a PE Mechanical, PE Power and PE Civil report all read the same way. It has one row per knowledge area from your exam's specification, and three things in each row.

NCEES uses the 0–15 scale so that reports are consistent across exams and so that you can compare your own reports across attempts. The real reports are grayscale; the colored one on NCEES's site is a sample.

One more thing people notice: the item counts can add up to fewer questions than you sat. NCEES says every exam includes a small number of pretest questions that are not scored. That is the likely reason, though NCEES doesn't spell out how those appear on the report.

The dashed line is where passers averaged

This is the misreading that does the most damage. Candidates see every row sitting under the line and conclude they were nowhere near. The line is something else: in each knowledge area, it marks how the examinees who passed did on average.

Think about what that means. The line is an average of a group, so in any given area a large share of the people who passed sat below it too. Nobody passes by clearing the dashed line in every row. Being under it in an area means you did worse there than a typical passer did. It does not mean you failed that area, and it does not mean you were below the pass standard in it.

NCEES's own guidance has two bands, and they're a sensible way to sort your rows:

• Significantly below the passing examinees. NCEES says this "contributed to your failing results" and recommends substantial study.
• Near or just above. Your understanding "may be improved by further study." Not a pass on the topic. Just not where the points went.

What it will not tell you

"How close was I really?" is the question candidates ask most often about their report. The honest answer is that the report can't say, and NCEES is direct about it:

• Not your score. The number of questions you got right "cannot be determined from this scaled score."
• Not the passing score. The report "cannot be used to determine the passing score." NCEES doesn't publish one, because it shifts slightly with the difficulty of each exam form.
• Not which questions you missed. NCEES does not release questions or answers for review.
• Not why. An area score can't distinguish a topic you never learned from one you knew and ran out of time on.

People try to reverse-engineer a number anyway, by collecting other candidates' reports and guessing. You can spend an evening on that. It won't change a single hour of what you should study, which is the only decision the report exists to inform.

It is also one sample. Sit a different set of questions on a different day and the report could come out differently. An area with five scored questions swings a long way on one lucky or unlucky item. Trust the big rows more than the small ones.

Turn it into a plan: gap times questions

The instinct is to rank areas by how far behind you were and start at the bottom. NCEES's own worked example does something better. It adds up the number of questions in the weak areas, because an area with more questions gives you "more opportunity to improve."

So make a four-column table from your report:

(Illustrative rows, not a real exam's areas.)

The rules behind the ordering:

1. Large gap and many items comes first. That is where the most points are.
2. Large gap and few items comes next, but cap the hours. Six questions can't repay sixty hours.
3. Small gap and many items is worth more than it looks. Going from slightly behind to slightly ahead across twelve questions is real points.
4. At or above the line is not "done". Those points were holding you up. Keep them warm with a short set each week.

Then check the table against your exam specification. The specification lists the topics inside each knowledge area, which answers the other common complaint: not knowing which topics sit under a row on the report.

When every row is below the line

A lot of reports come back this way, with room to improve in nearly every area. It feels like an instruction to start over. It usually isn't.

If you were behind everywhere by a similar amount, a topic list is probably not your problem. A knowledge-area report can't see the three things that most often are:

• Pace. You could solve them, but not in six minutes each, and the back half of the exam went to guesses.
• Setup slips. Units, a misread condition, the wrong table. Right method, wrong answer.
• Familiarity. Your practice scores came from problems you had seen before, so they measured memory. (How that happens.)

The report can't sort you into one of these. A week of practice can. Work a timed set of problems you have not seen before in your top-priority area, then label every miss: didn't know it, knew it but too slow, or knew it and slipped. The tally tells you what kind of retake this is. Mostly the first: it's a content plan, and the table above is your order. Mostly the second or third: more reading won't move your score, and timed work and re-solving your misses will.

If you have two reports

NCEES built the scale so reports can be compared across attempts, and it is worth doing. Three cautions keep it honest:

• Compare the large areas. Movement in a five-item row is mostly noise.
• Look for areas that didn't move despite the hours you put in. That is a sign the method for that area needs to change, not the hours.
• An area that dropped while you worked on others is normal. It's the argument for the weekly maintenance set.

A report that looks discouraging is not a verdict. Candidates whose first report looked like this have passed on the next attempt, and the change they often name is spending more time understanding the solutions to the questions they were getting wrong in practice.

The retake logistics

• Results are typically available 7–10 days after a computer-based exam. PE Structural depth results take longer.
• How often you can sit. NCEES allows one attempt per testing window (the windows are calendar quarters) and no more than three in any 12-month period.
• Your board may be stricter. Some licensing boards limit attempts further or add requirements after repeated attempts. Your result notice includes board-specific next steps; read those before you pick a date.
• Everyone is graded to the same standard. First-time and repeat examinees are scored identically, and NCEES sets no quota of passes.

Exam-specific retake plans: PE Mechanical · PE Power · PE Civil.

Where CastorPrep fits

Your NCEES report ranks the areas of one sitting. CastorPrep's diagnostic does the same job on fresh problems, before the next sitting: a short set across your exam's areas, ranked, with one place to start. From there you practice area by area on problems you haven't seen, each with a worked solution, and Castor, the tutor, to find the step where your attempt went wrong. That is the why the report can't give you.

Start practicing

Read the big rows first, label a week of misses, and pick a date far enough out to fix what they show.