Engineering notes from EJH
Practical perspectives on systems engineering, software development and electrical & electronic engineering, written by our engineers.
Handover
What Should Be in an O&M Manual?
What should be in an O&M manual? A practical handover guide to the core sections, making the manual usable and building handover into the plan.
Verification & validation
Verification vs Validation, in Practice
Verification vs validation in systems engineering: the different questions each answers, a practical example, and why to plan both early.
Systems integration
Cause-and-Effect Matrices: Getting the Interfaces Right
How to use a cause-and-effect matrix to define system interfaces: what belongs in it, signals at both ends, coordination, revisions and commissioning.
Testing & commissioning
What Makes a Good IST Narrative?
What makes a good integrated systems test (IST) narrative: clear objectives, test boundaries, executable steps, pass and fail criteria and safe testing.
Software & portals
One Portal at a Time: Reducing Risk and Making Compliance More Accessible
How systems engineering and well-designed portals make important workflows clearer, more consistent and easier to evidence.