What ICRC shows about the future of Indonesian coffee roasting.

Competition makes the standard visible

ICRC 2026/2027 took place from 6-9 May 2026 at NICE PIK 2 in Jakarta. Seventeen roasters competed on the Pratter 1.5 Basic Series. According to the published results, Angga Adhdhuha Achmad of Outcome Coffee Company and Steven Nurcahyana of Hana Roastery both finished with 336 points. The final order was decided through the Accuracy of Coffee Descriptor score.

That detail matters. A roasting competition is not simply a test of whether a competitor can produce a technically attractive curve. The result must still be understood and described in the cup. Technical execution and sensory accuracy have to meet.

The same principle applies outside competition. In a working roastery, a curve is evidence, not the final answer. A team also needs to know which green coffee was used, what the roaster intended, what changed during the batch, and whether the result delivered the intended sensory outcome.

Rostoc and Pratter both supported ICRC 2026/2027 as sponsors. Rostoc and Pratter also have an active product and content collaboration, and Pratter receives complimentary Rostoc access to support development and testing for compatible Pratter configurations. Rostoc was not presented as part of the competitors' judging or roast workflow.

Indonesian engineering is part of the story

Pratter's role at ICRC is significant because its machines are designed and manufactured in Surakarta, Indonesia. The 2026/2027 event used the Pratter 1.5 Basic Series, showing that a compact machine built locally could serve as the common roasting platform for a national championship.

The strongest way to describe this is not as a symbolic victory over imported equipment. It is evidence that the Indonesian roasting industry is developing more of its own technical capability: design, fabrication, controls, service, operator knowledge, and software integration.

Local engineering also creates a shorter feedback loop. Machine builders can hear directly from Indonesian roasters, technicians, competitors, and production teams. Those conversations can shape the next controller, connection, workflow, or support document.

Pratter's ICRC 2026/2027 report provides its event recap, while SCAI publishes the official competition rankings.

Excellence is more than consistency

Consistency is often treated as the goal of professional roasting. It matters, but the word can become too simple. Repeating an excellent result is valuable; repeating a mistake is still consistent.

What a roastery really needs is accountable repeatability: the ability to see what happened, understand why it happened, evaluate the result, and make a deliberate decision about the next batch.

The more these records are separated, the more the team has to reconstruct the past before it can improve the future. A connected production record protects the roaster's judgment by keeping the decision and its context available to the wider team.

• The identity and physical properties of the green coffee.
• The intended roast plan or reference profile.
• The machine, controller, batch size, and operating conditions.
• Temperature, Rate of Rise, events, and relevant feedback data.
• Operator observations and changes made during production.
• Cupping results and the quality decision that followed.

Why Rostoc supports Pratter machine integrations

Rostoc is built to keep roasting work connected. Machine data is an important part of that record, but it is only one part. A roast should remain linked to its green lot, plan, batch, weights, notes, history, and later quality decisions.

Our collaboration with Pratter is an early step toward making that workflow more accessible to Indonesian roasteries. Rostoc currently lists supported configurations for Pratter 1.5-2023, Pratter 5, Pratter Autonics, and Pratter PLC. Exact support depends on the machine model, controller, and connection configuration.

That specificity is important. A machine brand alone is not enough to guarantee a safe or useful integration. Before production use, a roastery should confirm the exact configuration, validate each sensor and feedback stream against a trusted reference, save a short test record, and reopen it to confirm that the data remains meaningful.

The current models and support status are documented in the Rostoc Pratter compatibility catalog.

Software should protect the roaster's judgment

Roasting software should not claim to replace the person operating the machine. Competition makes the reason obvious. Two roasters can use the same equipment and receive the same categories of data while making very different decisions.

The value of software is that those decisions can become visible and reusable. A roaster can compare production batches with a reference, see where a profile drifted, preserve notes at the moment they mattered, and connect the roast to the coffee and lot that produced it.

Over time, this creates a durable memory for the roastery. A successful roast does not survive only as something one operator remembers. A disappointing roast does not have to be investigated from fragments. Both become records the team can learn from.

From a national stage to everyday production

Most production roasts will never be scored by a competition jury. They still deserve the same underlying discipline. A wholesale customer expects the next delivery to behave like the last one. A production team needs to know when a green lot changes. A roastery owner needs confidence that quality knowledge is not held by only one person.

ICRC celebrates a small number of exceptional competition roasts. The larger opportunity is to help thousands of everyday roasts become more observable, traceable, and useful to the people producing them.

This is the future we see in Indonesian coffee roasting: local manufacturing, strong technical service, skilled roasters, meaningful competition, and software that connects production knowledge instead of separating it into files and spreadsheets.

Pratter gives the roaster a physical platform for applying skill. Rostoc helps preserve the production context around the result. Neither replaces the roaster. Both should help their expertise travel further.

Sources and further reading

Read Pratter's Indonesia Coffee Roasting Championship 2026/2027 recap and SCAI's official ICRC rankings.

For the software and machine-support context, explore the Rostoc coffee roasting software guide and Pratter compatibility catalog.