CalcGen is a web-based, dynamic problem generator for the International Schools’ Assessment (ISA). The 2022 version replaces older static worksheets with an adaptive-like engine that generates infinite math problems aligned to ISA’s core strands:
Number & Operations, Algebra, Geometry & Measurement, and Data & Probability.

Key improvement in 2022: Smarter randomization + difficulty scaffolding. Older versions just changed numbers; 2022 changes problem structure (e.g., simple area → composite area with missing sides).

For decades, the process control industry has grappled with a bottleneck in engineering efficiency: the manual translation of process requirements into control logic, Human-Machine Interface (HMI) tags, and documentation. This "black box" approach often led to inconsistencies between design documents and actual controller logic, posing risks to safety and operational efficiency.

In 2022, ISA amplified its support for frameworks that enable "CalcGen"—the automated generation of calculations and control logic. While not a singular software product released by ISA, the 2022 CalcGen movement refers to a confluence of updated standards (such as ANSI/ISA-88 and ISA-95) and technical paper series advocating for Model-Based Systems Engineering (MBSE). This initiative aims to standardize the way calculations are defined, validated, and generated, ensuring that the code running in a Programmable Logic Controller (PLC) or Distributed Control System (DCS) is a direct, error-free derivative of the engineering design.

Valve sizing errors are a leading cause of plant downtime. The 2022 CalcGen revision adopts the latest valve sizing equations, including new handling of non-turbulent flow regimes and two-phase mixtures. It also includes a built-in database of 15,000+ manufacturer Cv curves, updated quarterly.

Why it’s better:
No more downloading separate manufacturer apps. CalcGen 2022 gives you a neutral, standard-compliant comparison of Emerson, Flowserve, and Fisher valves side-by-side.

ISA 2022 technical sessions showcased how modern DCS platforms are utilizing import/export mechanisms to facilitate CalcGen. Engineers define calculations in a spreadsheet or database, and generation tools translate these definitions into controller-specific code. This eliminates typographic errors—the most common source of control system bugs. If the calculation requires a change, the engineer updates the master database and regenerates the code, ensuring the change is propagated universally.