Lean SIRI, Explained: What the Assessment Actually Tells You
SIRI is the international standard for industrial maturity. Here’s what a Lean SIRI assessment measures, what the score means, and how to turn it into a roadmap.
What the Assessment Actually Tells You
When a board asks "how digitally mature are we, really?", opinions vary. The Smart Industry Readiness Index (SIRI) was built to end that argument. It is an internationally recognised framework, co-developed by Singapore's EDB, industry, and academia, for assessing industrial maturity across three foundational dimensions.
This post is a plain-English tour of what a Lean SIRI assessment measures, how to read the score, and why the score itself is the least valuable part of the exercise.
The Three Building Blocks
SIRI evaluates a plant across three dimensions, each broken into three bands:
| Dimension | What it covers |
| Technology | The stack: sensors, systems, integration, analytics, and how data flows (or doesn't). |
|---|---|
| Organisation | The people side: skills, roles, decision rights, and the supply-chain ecosystem you operate in. |
Each band is scored 0 to 5, producing a heat map rather than a single number. That heat map is the real output.
The Score Is a Snapshot, Not a Verdict
A common mistake is treating the SIRI score as a grade. It isn't. A score of 2.4 in Process and 1.1 in Technology tells you exactly where the next dollar of investment should go, and, just as importantly, where it shouldn't.
> The point of a SIRI assessment isn't to feel good or bad about where you are. It's to remove opinion from the prioritisation conversation.
We've run assessments where the leadership team was convinced their problem was a missing MES, only for the heat map to show that their process band was the bottleneck. Installing an MES on top of broken processes would have digitised the waste.
From Heat Map to Roadmap
The assessment is the first 20% of the work. The remaining 80% is sequencing the gaps into a roadmap that:
- Bankrolls itself. Quick wins in the first 90 days return enough to fund the next phase.
- Builds capability. Each phase leaves your team stronger, not more dependent on consultants.
- Fits your reality. Sequenced against budget, talent, and operational risk, not a vendor wishlist.
This is why we pair every SIRI assessment with a Lean Six Sigma diagnostic. SIRI tells you where you are; Lean Six Sigma tells you what's leaking.
What to Expect During an Assessment
A typical Lean SIRI engagement runs two to three weeks:
- Week 1: on-site Gemba walks, value-stream mapping, systems and data review, and structured interviews across operators, supervisors, and leadership.
- Week 2: scoring, calibration with our certified assessors, and roadmap prioritisation.
- Closeout: a debrief with a heat map, gap analysis, and a 12 to 24 month phased roadmap with expected returns.
You leave with an objective baseline, not a slide deck and a goodbye.
Next Step
If you're uncertain whether your operation is ready for Industry 4.0, or you suspect your current roadmap was built on assumption rather than evidence, a Lean SIRI assessment is the fastest way to find out. Reach out to marketing@opexcg.com to scope one.