Complex rules. Clear outcomes

When calculations are difficult to change and decisions are hard to explain, your team spends valuable time working around the problem. IDIOM helps you turn complex rules into consistent, tested calculations and decisions, so you can respond faster and have greater confidence in the results.

Make the logic behind your outcomes easier to understand, maintain and reuse. Working alongside your existing systems, IDIOM helps reduce manual effort and your reliance on specialist development for every change.

When complexity gets in the way

Important calculations and decisions can become buried in system code, spreadsheets or the knowledge of a few specialists. A spreadsheet that starts as a practical fix can grow into a vast, complicated tool running a critical part of your operation. Layers of formulas and manual workarounds can make it hard to understand and scary to change.

As volumes grow, those workarounds become harder to manage. Teams spend more time checking results and maintaining duplicated rules. When a specialist moves on or retires, you may be left unable to explain how an outcome was reached. IDIOM helps make that knowledge visible and easier to maintain, giving you a clearer, more controlled way to manage complexity.

The spreadsheet risk T+1 exposes

Make complex logic easier to manage

IDIOM brings the rules behind your calculations and decisions into visual models that business experts and technical teams can review together. You can see how the logic works, test it against real examples and understand the effect of a change before it goes into use.

By managing this logic separately from the applications that use it, IDIOM makes it easier to introduce changes without repeatedly rebuilding the surrounding systems.

  • Understand your rules 

    Make calculations and decision paths visible, so knowledge is easier to share and maintain. 

  • Test before release 

    Compare results with expected outcomes and reuse saved tests when requirements change. 

  • Work with your existing systems

    Integrate calculations and decisions with existing applications, with version history and traceability to support ongoing control. 

Reasons to choose IDIOM

A clearer way to manage complex rules, with benefits for the people building, using and reviewing your calculations and decisions, as well as for your business.

no1

Respond faster to change

Update calculations and decision rules as requirements evolve. Keeping this logic separate from core applications helps shorten delivery times and reduce the development effort involved in making changes.

no2

Reduce repetitive manual work

Apply tested rules across large volumes of data, reducing repeated calculations and checks. Give your team more time to focus on cases that need their expertise.

no3

Have confidence in your results

Check calculations against expected outcomes before release. Saved test cases help you spot issues earlier and assess the impact of future changes.

no4

Explain how outcomes were reached

Trace the data, rules and calculations behind a result. Give operational teams, reviewers and auditors clearer evidence to understand and challenge decisions.

no5

Build once and reuse

Reuse rules, calculations and tests across services. Maintain consistency while retaining controlled differences where scheme or customer requirements vary.

no6-

Make more of your existing systems

Introduce calculation and decision services alongside the technology you already use. Address specific challenges step by step, without a full platform replacement.

Where IDIOM can make a difference

From pension calculations to time-sensitive financial operations, IDIOM helps you manage complex rules with greater control. Explore examples of how it can be applied to your challenges.

Pension calculations

Reduce manual intervention and reliance on spreadsheets for selected pension calculations. IDIOM helps you turn complex calculation rules into tested, repeatable models, reducing manual checks and making changes easier to manage. Trace how results were reached and give your team greater confidence when requirements change.

Pension dashboard value calculations

Calculate pension values from scheme and member data, with results that can be checked and traced. IDIOM helps you test calculations against expected outcomes and understand the rules and data behind each result, giving your team clearer evidence when reviewing values for pensions dashboards.

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Build your capability with expert support

We work alongside your team to help you build your first IDIOM solution, combining deep pension knowledge with practical guidance. Your people develop the skills to model, test and maintain the rules, with appropriate technical support and review.

Build on your first solution

With your own IDIOM licence, your trained team can apply those skills to further business challenges. You retain control over your rules and how they are used, working within your organisation's governance and approval processes.

Heywood can continue to support you as a centre of excellence, providing specialist guidance as your use of IDIOM develops.

Who we work with

Our customer list speaks for itself. At Heywood, we believe a true partnership is a two-way street. Mutual trust and respect are at the core of every interaction. And that’s why we enjoy long-term partnerships with all of our customers.
View case studies

Other resources

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