Statistical Process Control Certification Test (SPC)

The Statistical Process Control Certification Test (SPC) is a free intermediate-level, 20-minute skill test from Science of Apps. It tests statistical process control (SPC) skills — variation and control chart fundamentals, choosing and building control charts for variables and attributes, interpreting charts with run rules, and process capability and measurement system analysis — written to the NIST/SEMATECH e-Handbook of Statistical Methods and the AIAG SPC manual for 2026. Score 70% or more on its 20 questions to earn a verifiable Statistical Process Control certificate (SOA-SPC). Every question is based on published standards and research — including Statistical Process Control (SPC) reference manual (AIAG), NIST/SEMATECH e-Handbook of Statistical Methods (process control) (NIST) — and each answer is explained with its source.

Take the free Statistical Process Control Certification Test on Science of Apps. It tests control charts, variation, and process capability (Cp against a 2026–2027 syllabus, and passing earns a verifiable certificate you can add to LinkedIn.

Read the four skill areas on this page, then take the 20-minute test online — no fee, course or sign-up. You see every answer explained when you finish. Score 70% or more and you get a Statistical Process Control certificate straight away, on screen, as a PDF and by email, with a credential ID anyone can verify.

Yes. The questions are original scenarios written by Science of Apps, and each one is based on a public source you can read: Statistical Process Control (SPC) reference manual (AIAG); NIST/SEMATECH e-Handbook of Statistical Methods (process control) (NIST). The source is shown under each question and linked in the answer review. Science of Apps doesn't copy questions from other tests.

Four skill areas with five questions each, drawn from a bank of 10 per area so a retake brings new questions: Variation and Control Chart Fundamentals (Common and special causes, Control limits and Sampling); Choosing and Building Control Charts (Variables charts, Attributes charts and Special charts); Interpreting Charts and Run Rules (Out-of-control signals, Run rules and Response); Process Capability and Measurement Systems (Capability indices, MSA and Gage R&R). Every question is an original scenario written to the 2026–2027 standard, with the published source named under it.

Quality engineer, Process engineer, Manufacturing technician, Six Sigma Green Belt and Quality inspector. It suits anyone who wants a quick, verifiable way to show Statistical Process Control knowledge in 2026 and 2027, from students and career switchers to experienced professionals.

A method of monitoring a process with statistics, mainly control charts, to tell normal (common-cause) variation from unusual (special-cause) variation, so teams act on real signals and don't over-adjust.

No. A process must first be stable (in statistical control); capability indices such as Cp and Cpk then compare its spread with the specification limits.

Yes. The test is online, in English and free everywhere — people take it from India, the US, the UK, Europe, Africa, Latin America and Asia-Pacific. Your certificate is dated with your own local date and can be verified from anywhere at scienceofapps.com/certification/verify/.

20 questions — 5 from each of 4 skill areas — with a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

We rate it Intermediate: assumes hands-on experience in the role. It has 20 scenario questions — 5 from each of 4 skill areas — and a 20-minute limit. You need 70% (14 of 20) to pass and 90% for distinction.

Nothing. There is no fee to take a test, to receive the certificate, to have it emailed or to verify it, and no sign-up.

On our server, not in your browser. The answers never reach the page until you submit, so a certificate can only be earned by passing. Each certificate gets a unique credential ID stored by Science of Apps.

You see your score for each area and every question with the correct answer and why, with the published source behind it. You can retake after 30 minutes, and the retake draws questions you haven't seen yet.

No. Every certificate is dated, so it always shows when you passed. Retake a test any time for a newer date or a higher score.

Yes. After you pass, Add to LinkedIn opens the Licenses & certifications form with the certificate name, Science of Apps as the issuer, the issue date, your credential ID and the verification link filled in. You can also download it as a PDF or PNG, and it's emailed to you as a PDF.

Every certificate has a credential ID and a QR code. Scanning it, or entering the ID at scienceofapps.com/certification/verify/, shows the holder's name, the certification, the score and the issue date from our records.

No. They are Science of Apps' own assessments of applied skill. They aren't issued by a university or standards body, and they work best alongside a portfolio that shows the skills in real work.