- The Number: 75% and What It Means
- What the Score Actually Measures
- Why There Is No Official Domain Breakdown
- Where Points Hide: The 18 Distinct Skills
- The Verification Checks That Protect Your Score
- Format, Fee, and Testing Mechanics
- CSWAP-SU, CSWPA-SU, and CSWP-SU: Same Credential, Different Labels
- A Score-Driven Prep Plan
- Retake Rules and the Cost of a Miss
- Frequently Asked Questions
- The minimum passing grade for Certified SOLIDWORKS Advanced Professional Surfacing is 75%, within a 90-minute hands-on exam.
- The exam repairs broken or incorrectly imported surface bodies, so partial, unfinished models cost you points.
- The issuer publishes 19 skill lines (18 distinct topics) but no per-domain weighting or question count.
- Retakes require at least 14 days and a fresh exam credit, so a rushed first attempt is expensive.
The Number: 75% and What It Means
The minimum passing grade for the Certified SOLIDWORKS Advanced Professional Surfacing exam is 75%. That figure comes from the issuer, SOLIDWORKS (Dassault Systèmes), which lists the credential on its surfacing professional certification page under the current CSWP-SU name. The exam runs 90 minutes and is delivered online, with candidates working in the SOLIDWORKS desktop application on supplied files.
The 75% threshold is simple to state, but it behaves differently from the cutoff on a multiple-choice test. In a hands-on CAD exam you are not choosing among four options; you are producing models and numeric results that are checked against expected values. Missing the cutoff usually does not come from misunderstanding a concept. It comes from one or two surface bodies that fail to knit, a thicken that errors out, or a result that is off by a few units because of a setup mistake.
If you are still deciding whether to attempt it, the ROI analysis for the certification and the requirements and eligibility guide cover the surrounding decisions. This article stays focused on the score itself.
What the Score Actually Measures
The exam format centers on advanced surface creation and on the repair of broken surface bodies or incorrectly imported bodies. That second half matters for scoring. Many problems hand you geometry that is already flawed: gaps between faces, surfaces that will not knit into a closed volume, or imported bodies that behave badly when you try to thicken them. Your result is judged on whether the repaired or rebuilt model meets the stated requirements, typically verified through measurable properties.
That has a few practical consequences for how points are earned:
- Outcome beats method. Several surfacing strategies can reach the same result. A boundary surface may stand in for a loft, or a filled surface may close a hole another candidate patches with a planar surface. What counts is whether the finished body is valid and measures correctly.
- Validity is binary. A body that almost knits into a solid is, for scoring purposes, a body that does not. Closing the last gap matters far more than polishing curvature elsewhere.
- Numbers are checked. Because answers are verified against expected measurements, unit systems, material assignment, and decimal precision are scoring inputs, not afterthoughts.
For a broader sense of how demanding this style of test is, see how hard the CSWAP-SU exam really is.
Why There Is No Official Domain Breakdown
Candidates often ask how the 75% splits across topics, and the honest answer is that the issuer does not publish a weighted breakdown. The exam page lists 19 skill lines covering what the exam touches, but these are unweighted exam skills, not 19 official weighted domains. They are not 19 questions, and they are not an exhaustive blueprint of every operation you might need. "Spline Creation" appears twice in the published list (positions 1 and 18), so there are 18 distinct topic names across the 19 lines.
That means you should not assume equal allocation, and you should not guess which topic is "worth the most." Any site claiming an exact percentage per domain is inventing it. The sensible response is to prepare every listed skill to the point where you can execute it quickly and verify the result. Our complete guide to the 19 content areas walks through each line in more detail.
Where Points Hide: The 18 Distinct Skills
Because the exam is not weighted by published domain, the smart move is to group the listed skills by the failure modes that actually cost candidates points. The topics below come straight from the issuer's coverage list.
Curve and Spline Foundations: Spline Creation, 3D Curve Creation, Guided Curves
Curves drive nearly every surface you build, so a sloppy sketch propagates into every downstream feature.
- Control spline handles and tangency so the resulting surface does not ripple.
- Build 3D curves that sit exactly where a boundary or loft expects them.
- Use guide curves deliberately; a guide that misses a profile endpoint produces a failed or distorted surface.
Surface Creation: Boundary Surface, Loft/Blend Surfaces, Filled Surface, Swept Surface, Planar Surface, Ruled Surface Creation
These are the core builders. Knowing which to reach for is half the skill.
- Boundary surface versus loft: boundary gives bidirectional control and cleaner curvature, while loft is faster for simple profile transitions.
- Filled surface patches irregular holes, while planar surface only works on closed planar boundaries.
- Ruled surface is the quick tool for building a surface off an existing edge.
Surface Editing: Trim Surface, Untrim Surface, Extend Surface, Offset Surface, Move Face
Repair problems are largely solved here. Trimming and extending close gaps; untrim restores removed areas of a surface.
- Extend surfaces just enough to guarantee clean intersections before trimming.
- Untrim to recover surface area an earlier trim or an import removed.
- Offset surface creates parallel geometry, so confirm the offset distance and direction.
Solidification and Finishing: Knit Surface, Thicken, Fillet, Split Solid Body
This is where most visible failures show up. A knit that does not close or a thicken that errors is often the end result of an upstream mistake.
- Knit surface only forms a solid when the boundaries truly close; check for gaps before you assume the knit is at fault.
- Thicken fails when surfaces have tiny gaps, sharp curvature, or offsets that collapse on themselves.
- Fillet and split solid body come late, so errors there often trace back to poor edge geometry earlier.
For a hands-on look at how these topics fit a learning sequence, the CSWAP-SU study guide maps them into a first-attempt plan.
The Verification Checks That Protect Your Score
Because results are verified numerically, the cheapest points on the exam are the ones you protect with habits rather than new knowledge. Build these checks into every problem:
- Confirm units first. Check the document unit system before modeling. A correct model in the wrong units gives a wrong answer.
- Confirm material. If mass is requested, the assigned material and its density drive the result. Verify it matches the problem statement.
- Check decimal precision. Make sure displayed precision is high enough to read the answer to the required places, not rounded early.
- Run surface area and mass checks. Compare measured surface area and mass against what the geometry should produce. A result that is far off usually signals a missing face, an unclosed knit, or a wrong dimension.
- Inspect knit status. After knitting, verify whether you have a solid or still a surface body, and whether any gaps remain.
Key Takeaway
When a thicken or knit fails, do not keep retrying the same feature. Step back one operation, inspect edges for gaps, extend or trim to close them, and then rerun. Repeating a failing feature burns your 90 minutes without changing the outcome.
Troubleshooting the failures that surface repairs produce, including knit surface failure and thicken failure, is worth dedicated practice time. Our one-page cheat sheet is a handy place to keep these checks in front of you.
Format, Fee, and Testing Mechanics
The mechanics around the score are straightforward but worth knowing before you book.
| Item | Detail |
|---|---|
| Issuer | SOLIDWORKS (Dassault Systèmes) |
| Format | Hands-on advanced surface creation and repair of broken or incorrectly imported surface bodies |
| Duration | 90 minutes |
| Minimum passing grade | 75% |
| Fee | USD 20 (North America), one attempt |
| Delivery | Online through SOLIDWORKS/VirtualTester |
| Software requirement | SOLIDWORKS 2017 or later to open exam files |
| Prerequisites | No formal entry prerequisites for Associate/Professional exams |
| Retake wait | At least 14 days, plus a fresh exam credit |
| Certificate validity | No official expiration date for customer/student certificates |
A few clarifications. The 2017 software requirement is a compatibility minimum for opening the exam files, not an exam revision year, and the issuer's exam page is undated. Delivery runs through the VirtualTester Web Client in current instructions, though older material refers to Tangix or TesterPRO, which is the same testing ecosystem under earlier naming. The exam page recommends SOLIDWORKS Design Essentials, Advanced Part Modeling, Advanced Surface Modeling, and the issuer's surfacing exam-preparation course, but these are recommendations, not mandatory course-hour requirements. See the certification cost breakdown for how the USD 20 fee fits into total preparation spending, and the scheduling guide for booking logistics.
CSWAP-SU, CSWPA-SU, and CSWP-SU: Same Credential, Different Labels
Search results and study materials use several names for this exam, which can confuse candidates comparing resources. The credential discussed here is Certified SOLIDWORKS Advanced Professional Surfacing. The issuer's current name for it is CSWP-SU (SOLIDWORKS Surfacing Professional), and an older alias, CSWPA-SU, still appears in some legacy catalog material and file names. When you search for practice resources, you will see all of these terms. They refer to the same surfacing exam, so searches such as "CSWPA-SU practice test" and "CSWP-SU exam" lead to related material.
If you want the naming story in more depth, our explainers on what CSWAP-SU is and what the abbreviation stands for cover it.
A Score-Driven Prep Plan
Because the 75% threshold rewards breadth plus verification, schedule your preparation so every listed skill gets hands-on repetition, with the failure-prone topics later when you can combine them. Here is one way to sequence four weeks, tied to the exam's own topic list.
Curves and Guides
- Spline Creation and 3D Curve Creation drills with tangency control.
- Guided Curves practice so profiles and guides connect cleanly.
- Set up a habit of checking units, material, and precision at the start of every file.
Building Surfaces
- Boundary Surface, Loft/Blend, Filled, Swept, Planar, and Ruled Surface Creation.
- Rebuild the same shape with boundary and with loft to learn the trade-offs.
- Practice filling irregular holes with Filled Surface.
Editing and Repair
- Trim, Untrim, Extend, Offset, and Move Face on deliberately damaged bodies.
- Close gaps in imported geometry until the knit succeeds.
- Rehearse surface area and mass checks on every repaired model.
Solidify and Simulate
- Knit Surface, Thicken, Fillet, and Split Solid Body in combination.
- Run full 90-minute timed mock sessions using original practice problems.
- Review each miss by naming the failure: gap, wrong units, bad curvature, or time.
Time is the hidden scoring constraint, so run at least a couple of full 90-minute sessions before the real attempt. If you want structured materials, our training overview outlines options, and the main practice test site offers original practice problems you can use for timed runs.
Retake Rules and the Cost of a Miss
The fee is USD 20 for a North American attempt, and each attempt consumes an exam credit. If you fall short of 75%, you must wait at least 14 days and obtain a fresh exam credit before trying again. That makes a failed first attempt more costly in time than in money, since the two-week gap interrupts momentum.
A practical retake approach is to use those 14 days purely for diagnosis. List which problem types consumed the most time or produced the most errors, then drill only those. Candidates who miss narrowly usually lost points to verification slips or to one stubborn knit or thicken problem, not to a broad knowledge gap. Resist the urge to relearn everything; target the two or three skills that failed.
For context on how others fare, note that no official pass-rate figure has been verified for this credential, so treat any specific percentage you encounter with caution. Our pass rate discussion explains what can and cannot be said from available data.
Frequently Asked Questions
The minimum passing grade is 75%. The exam is 90 minutes long and is a hands-on test of advanced surface creation and the repair of broken or incorrectly imported surface bodies, delivered online through SOLIDWORKS/VirtualTester.
The issuer publishes 19 skill lines covering what the exam touches, but these are unweighted skills rather than weighted domains. No official per-domain percentage is published, so prepare every listed topic instead of trying to target a high-value one.
The question total has not been verified. The issuer links a sample exam package from its exam page, but its contents were not inspected here, so rely on the official download rather than third-party estimates.
You can retake the exam after waiting at least 14 days and purchasing a fresh exam credit. The certificate for customers and students has no official expiration date once earned, so you only need to pass once.
No. They are different labels for the same surfacing credential. CSWP-SU is the issuer's current name, while CSWPA-SU is an older alias that still appears in some legacy material and search results.
No formal entry prerequisites apply to Associate and Professional exams. The issuer recommends courses such as Advanced Part Modeling and Advanced Surface Modeling plus its surfacing exam-preparation course, but these are recommendations, not mandatory requirements.
Earning the credential comes down to disciplined breadth, careful verification, and enough timed practice to finish inside 90 minutes. If you are weighing how the certification could help your career, our guides to CSWAP-SU jobs and the salary picture are a natural next read, and you can start timed practice on the CSWAP-SU practice test site whenever you are ready.