Manufacturing is in the middle of its fourth reinvention. After mechanisation, mass production and computerisation, Industry 4.0 is fusing the physical and the digital into systems that sense, connect, analyse and increasingly decide for themselves.
Few manufacturing leaders still question whether that matters. Far fewer can say, with evidence, where their operation actually stands.
That is the gap between awareness and action, and it is where transformation budgets quietly go wrong. Investment gets approved against a picture that has never been measured.
You cannot plan the climb until you know which rung you are standing on.
Five levels, one shared language
The Smart Industry Readiness Index (SIRI) describes Industry 4.0 maturity on five named levels. Each one describes the character of an operation, not a shopping list of technologies:
- Foundational — a digital presence is established, but systems still run in silos.
- Progressive — automation is spreading and basic IoT is starting to connect assets.
- Advanced — analytics is used effectively, with real visibility into the floor.
- Pioneering — extensive robotics; the company is defining good practice rather than chasing it.
- Industry-Leading — fully automated, AI-integrated, self-optimising operations.
Their value is that they give leadership, operations and partners one vocabulary. ‘Advanced’ means the same thing in a boardroom as it does on the shop floor, and the same thing in one market as in the next.
From sixteen scores to one honest rating
The five levels are the readable face of a rigorous system. Beneath them sit three Building Blocks — Process, Technology and Organisation — eight Pillars and sixteen Dimensions. Each dimension is scored on six bands, from 0 to 5, against its own published ladder, so a band describes a recognisable state rather than an opinion.
Those sixteen scores are averaged across the three Building Blocks into a single one-to-five star emblem. Half-stars are allowed, and the score is always rounded down.
The emblem never overstates where you are. That is exactly why it is worth having.
Because the rating averages across all three blocks, it also exposes the most common failure in transformation: pouring money into shop-floor technology while process and people are left behind. You cannot buy your way up a level through one block alone.
From maturity to measurable impact
The emblem carries a second signal in its colour: whether maturity is actually paying off. That is measured through EPIK — twelve Enterprise Performance Impact KPIs across five categories, from overall equipment effectiveness and first pass yield to energy consumption per unit.
A yellow star says maturity has been measured, but its impact has not. A purple star says performance impact is being actively tracked, so improvement can be proven from one assessment to the next.
If it is not logged, it did not happen.
Higher is not the goal. The right next rung is.
A level only means something against the field. SIRI benchmarks a facility against the best-in-class top 10%, the broad middle 80% and the bottom 10%, and places whole industries into four archetypes of transformation.
From there, TIER and the Prioritisation Matrix weigh cost, business KPIs and distance from best-in-class to decide where to act next, with at least one high-impact dimension from each Building Block. LEAD — learn, evaluate, architect, deliver — keeps that progress continuous, rather than a series of disconnected projects.
Band 5 everywhere is not the aim. The aim is the bands that fit your industry and cost profile, reached in a deliberate order.
Read the full guide
We have published the full guide, Understanding the 5 Levels of Industry 4.0 Maturity. Inside:
- The 3–8–16 architecture, and the nine-cell technology grid
- The six-band ladders for Automation, Connectivity, Intelligence and Integration
- What each of the five levels looks like in practice
- How the star emblem and its colour are calculated
- The 3B benchmark and the four archetypes of transformation
- The LEAD cycle, the TIER framework and the Prioritisation Matrix
A star rating is not a verdict on your facility. It is the first honest measurement of it.
Official SIRI Assessments are conducted by Certified SIRI Assessors. To scope an assessment for your facility, contact INCIT.
