Make a Choice to be Trusted

First certification efforts often succeed or fail long before the assessor arrives.  This was not a routine product roll-out. It was the company's first effort to bring one of their devices through a formal functional safety certification process, and that meant both the product and the development process would be subject to outside scrutiny.

The System

The client was a division of a multi-national Fortune 500 company and a well-established manufacturer of industrial safety monitors, including heat, flame, and gas detection systems. As competition increased, the company decided its new toxic gas detector, developed for use in the gas & oil industry, should carry internationally recognized IEC 61508 SIL2 certification.

The Challenge

SafeCode's consultant was brought in to help the client establish a certifiable path forward without disrupting the sound engineering practices already in place.

The assignment had several parts: create and document a certifiable process around the company's existing development approach; work with the lead software engineer to align implementation practices with certification expectations; and develop the safety architecture for the interface board responsible for monitoring detector-board status and alerts, commanding diagnostics, and communicating over the HART interface on the 4–20 mA network. If time permitted, the engagement would also include implementation of the interface board software.

The challenge was not simply to produce documentation for an assessor. It was to help a capable engineering team make the transition from solid internal practice to a development approach that could be examined, trusted, and certified.

The Approach

Rather than replacing the client's methods with a heavier process, the consultant built on what was already working. Existing practices were reviewed, organized, and documented in a way that preserved their strengths while providing the structure and evidence expected in a certification effort.

At the same time, the interface board architecture was developed with a strong emphasis on safety behavior, diagnostics, and dependable communications. The implementation work that followed was carried out with unusual discipline, using proven personal process techniques, lightweight formal methods, and multiple static analysis tools to support both speed and quality.

About four months into the engagement, the certification body representative from Exida evaluated the project's processes. His assessment was clear: the process was in good shape, and several safety elements in the design went beyond what he typically saw from other OEMs.

The Outcome

The original six-month engagement was extended by two months, and by the end of that period the interface board implementation was effectively complete, pending final test activity with the handheld unit still under development elsewhere.

Just as important, the work had been completed with an unusually strong combination of development speed and product quality — demonstrating that a first-certification effort does not have to trade productivity for rigor, or rigor for schedule.

When the remaining integration activity caught up, the IEC 61508 SIL2 certification proceeded without difficulty. The client gained more than a successful certification outcome: it gained a certifiable development process, a stronger internal foundation for future projects, and confidence that first-time certification could be approached as an engineering discipline rather than an administrative burden.

Corollary Lesson

First certifications often become harder than they need to be because organizations assume they must abandon their existing practices and start over. In many cases, the better result comes from identifying what is already solid, strengthening it where necessary, and making that discipline visible in a way an assessor can readily evaluate.

A successful certification effort is not only about proving that a device is safe. It is also about showing that the work behind it was carried out with clarity, discipline, and consistency.