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Bart Visscher, co-founder of software company Emendo, has had his business tested on several fronts by the Canterbury earthquake.
Emendo's cornerstone product CapPlan uses a range of mathematical algorithms to predict patient numbers, allowing hospitals to allocate operating theatres, roster staff and use bed space efficiently.
It is specifically designed to make rapid adjustments for a civil defence emergency.
Visscher said the past few days had been spent keeping an eye on the performance of the software, adjusting for the earthquake's effects such as the cancellation of non-urgent surgery. The premises, based just outside the cordon area, was lucky to escape major damage.
Visscher said the company's 35 staff were now working from home to meet international deadlines.
Co-founder Nick Burns flew out to talk to customers in Vancouver within a day of the quake, leaving behind his wife and children.
Since last Saturday they have played it by ear, said Visscher, pulling together as a team to get priority work done.
He said clients were understanding but the company needed to keep meeting milestones in order to get invoices paid. Fortunately only one staff member has been seriously affected by the quake, not only losing his house but as a member of Civil Defence has been at the frontline of assistance efforts.