There are several algorithm designs available
on the market; none of which addresses the non-linear multi-injection therapy problem.

Physiological models attempt to model the parts of the body.  They are instructional but impractical when applied to the day-to-day needs of people wth diabetes.

Insulin pump algorithms solve a simplified problem. When properly set, a pump-therapy patient will have a nearly linear (flat) blood-glucose profile over the course of a day.  So, adjusting for an unscheduled meal is a simple exercise.

Rules-of-thumb methods - taught by most physicians- attempt to simplify the math in a practical way, but the result is that patient blood-glucose levels fluctuate widely; accelerating the progression of the disease.

All of these methods use rules to operate.  Simplified rules make for erroneous recommendations.  Missing a condition or rule in the development of a more sophisticated model could have dangerous consequences.

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