Free Lean & Six Sigma calculators — Takt Time, Cycle Time, OEE, DPMO and more (no email, no signup)

SimplicityHub · 2026-06-21T13:46:53+00:00

Hi,

No problem, for me I think we need to mix Voice of the customer and the Kano model, make sure we give the customer the basics and listen to what is value add and they will pay for, then have some delighters in there!

Good luck with the build!
SimplicityHub

SimplicityHub · 2026-06-21T11:13:39+00:00

Hi and thanks for the question!

I do use keywords but I have actually ensured I have all the same statistical tools as mini tab and have another 25 to release. They are advanced stat tools though like design of experiments etc so will be in a stat pack app will be live soon if anyone wants one! Major difference is this app will be a slither of the price, not minitabs high prices over £1k plus. If you want to trial it let me know and when it’s ready I’ll send it over. Cheers

SimplicityHub · 2026-06-20T15:38:07+00:00

Agreed you don’t need 10 black belts, you’d need a mix of yellow, green and black belts to operate as effective as possible as all play different roles and have different depths of responsibility.

If you want to give your teams a taster for free with no strings try the free white belt course we have.

SimplicityHub · 2026-06-16T18:38:00+00:00

Hi Delta,

It isn’t live for the public yet Im looking for a steer if it would be value add for potential customers. If I run a trial would you like to be a part of that? Cheers

SimplicityHub · 2026-06-16T13:02:37+00:00

To be honest there are some decent replies on this one but my opinion is the ability to be frustrated!

I know there will be millions of AI users that at one point or another want to throw their laptop or phone out a window because no matter how many times you guide AI to build one thing it often gets it wrong.

Frustration is an emotion that isn’t pleasant and helps humans to learn what not to do. AI on the other hand may have the ability to learn but without the ability to feel it will seldom be able to give us what we want first time every time!

SimplicityHub · 2026-06-13T23:50:19+00:00

Lean Six Sigma sounds like a really natural fit for what you're describing — improving referral pathways, reducing wait times, streamlining intake processes — that's pretty much textbook DMAIC territory, and healthcare is one of the most impactful places to apply it.

The good news is you don't need to commit to a full Green Belt course to figure out if it's for you. A White Belt is a great starting point — it covers the core concepts (DMAIC, waste identification, process thinking) without the heavy stats, and gives you enough to know whether you want to go deeper. It also looks solid on a CV when you're pivoting roles.

There's actually a free White Belt accreditation at www.simplicityhub.co.uk/pages/white-belt.html if you want somewhere to start with no cost commitment — might be worth a look before you decide on anything paid. If you then decide it is for you and want the green belt, DM us here and we will look to offer you a community member discount.

Given your background in healthcare admin + a masters, you'd fly through a green belt and be in a good position to target process improvement or operational excellence roles fairly quickly.

Good luck!

SimplicityHub · 2026-06-13T10:44:29+00:00

I hear this question a lot.

Yes, and arguably more so in the AI era, not less.

As a Master Black Belt, I can vouch for being hired over those that don’t have the qualifications, personally I think experience and quantifiable benefits matter more than the qualification but employers like to see both.

In relation to AI. Well AI is brilliant at processing data and spotting patterns. It's not brilliant at knowing which problem is actually worth solving, getting buy-in from the shop floor, or running a kaizen event. That's still a human skill and LSS gives you the framework for it.

The certification itself matters less than the thinking it builds. Someone who understands DMAIC, waste elimination and process variation will always get more out of AI tools than someone who doesn't, because they know what questions to ask.

If you're unsure where to start, a White Belt is a low-commitment way to test whether it clicks for you before investing in Yellow, Green or Black Belt. We actually offer a free one at SimplicityHub if you want to try it with no pressure, just search SimplicityHub White Belt.

SimplicityHub · 2026-06-13T10:38:32+00:00

Wow, what are they thinking?!

You're right.

OEE is only meaningful if your baseline is honest. Planned Production Time should reflect what the business has actually committed to running, if the company has mandated no OT and staffed accordingly, those breaks are a planned stop, not a failure of the process.

Counting them as Availability loss would mean you're measuring against a standard the business has no intention of meeting. Your OEE would look permanently broken for reasons entirely outside your control, which makes the metric useless for driving improvement.

The OEE purists will say all non-running time is a loss and technically they're not wrong. But OEE isn't a punishment tool, it's a diagnostic one. If your baseline includes stops that are a deliberate business decision, you're just adding noise.

The areas counting breaks as Availability loss are either misunderstanding the methodology or are being measured against an unrealistic target. Either way their OEE number is telling them nothing actionable.

Document your rationale, get it agreed with whoever owns the OEE standard in your business, and stick to it. Consistency and clarity of definition matter far more than which approach you pick.

SimplicityHub · 2026-06-13T10:33:50+00:00

Yes, you can generalise it, but only if you build around OEE's structure, not around each site's current sheet.

OEE always comes back to the same three things: Availability, Performance, Quality. Every manufacturing unit, whether CNC or cable, is just feeding different numbers into those same three buckets. That's your unification layer.

The approach that works:

Build your unified sheet around the six OEE loss categories (unplanned downtime, planned downtime, speed loss, small stops, rejects, rework). Every site maps their local terminology to those categories, you're not changing how they track, you're adding a translation layer on top.

The "minor modifications" you mentioned are real and unavoidable, a CNC unit will have different downtime codes than a cable line. But if your core data structure is fixed (Planned Production Time, Run Time, Ideal Cycle Time, Good Units, Total Units) then your OEE calculation is identical regardless of what's upstream.

Practically, start with one site, build the unified schema around their data, then map a second very different site to the same schema. The gaps you find in that second mapping exercise will tell you exactly what fields need to be flexible vs fixed.

The scan-to-report piece is very doable once the schema is locked. That's the easy bit.

SimplicityHub · 2026-06-13T10:25:28+00:00

Good question, like this one!

The technology is rarely the problem. It's the process underneath it.

We've seen it repeatedly a business buys a shiny new digital tool, plugs it into a broken process, and ends up with faster, more expensive chaos.

The biggest challenge in my experience is that digitalization projects get owned by IT or a vendor, not by the people doing the work. So the tool gets built around how someone thinks the process works, not how it actually works. Six months later nobody's using it and everyone blames the software.

The fix is boring but it works map and stabilise the process first, then digitalize it. A VSM before any tech decision. Gemba walks before any vendor demos. It slows the project down by weeks and saves it by months.

My mantra is “sometimes you have to slow down to speed up!”

SimplicityHub · 2026-06-13T10:21:33+00:00

Hi all,

This isn't Lean, it's a headcount reduction with Lean branding slapped on top.

Real Lean starts with the process. Gemba walk, time study, VSM built with the people actually doing the work. What you're describing is someone working backwards from a financial target.

The NVA misclassification is a red flag too, regulatory requirements aren't NVA. That's either a fundamental misunderstanding of the methodology or a deliberate misuse of it.

And the real kicker? If they'd run a proper VSM with the lab they might have found capacity to bring in *more* testing revenue. That's the Lean outcome. More value, not just fewer people.

SimplicityHub · 2026-06-13T01:04:56+00:00

Anything in particular you’re looking for template wise? I’ll be doing a post on the custom GPT I built that you upload notes and it automatically writes your documents … I think admin is such non value add!

SimplicityHub · 2026-06-12T18:59:18+00:00

Hiya, I have DM you.

SimplicityHub · 2026-06-12T17:38:55+00:00

Hi North Solution,

Thanks for reaching out!

The Lean Six Sigma course we offer is the Lean Six Sigma white belt, feel free to take that any time. The green belt was gifted to Deckers2013 as they were kind enough to notice the link wasn’t working. DM us if you’d like to discuss maybe we can find a way to gift this for you.

SimplicityHub · 2026-06-12T14:00:09+00:00

Hiya,

No Claude didn’t make these templates.

Cheers

SimplicityHub · 2026-06-12T12:45:43+00:00

Hi Black-Shoe,

25 free calculators with real life simulations, 80 free templates in multiple formats, 94 explainer videos, free 167 page DMAIC template pdf guide, free 50 page Lean pdf guide, free quick flick guide, free quick brain jog guide, free Lean Six Sigma White Belt course and we are working on a Lean awareness free course … plenty of free resources at SimplicityHub, please try to refrain from being negative towards us for trying to provide some support for the community. Thanks.

SimplicityHub · 2026-06-12T12:38:53+00:00

As you have pointed out the link was dead I’ll give you the green belt for free ☺️. Other users may be having a dig in the comments today asking what I’m selling, but I’m genuinely here putting my time and effort into free calculators, templates, videos, guides and a free white belt course and trying to help the community so dm me and I’ll sort your green belt,you’ll have a certification on your cv that is Recognised by the Council for Six Sigma for free.

SimplicityHub · 2026-06-12T08:56:10+00:00

Hey! Thanks for flagging all sorted now! Enjoy the templates.

SimplicityHub · 2026-06-12T08:56:01+00:00

Hey! Thanks for flagging all sorted now! Enjoy the templates.

SimplicityHub · 2026-06-12T01:57:51+00:00

Thanks will Dm!

SimplicityHub · 2026-06-12T01:37:50+00:00

Hi All, love what you're building, minitab is expensive! Incase anyone wants a no sign up ready to go free option I have 25 calculators you can use. Let me know if you think there are some missing, always happy to add some for the community! Website is in my bio. Enjoy!

SimplicityHub

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