The HUSKY design Centre includes a set of hot runner nozzle dimension calculators. The complete calculator system consists of a series of HTML pages that invoke JavaScript routines.

Prior to the creation of the CD-ROM, customers were able to determine varius critical dimenstions by using tables and formulae provided by Husky. These were based on a spreadsheet used internally by hot runer desing engineers. The current calculator is more sophisticated than the tables and formulae but is still not as flexible as the internal spreadsheet. This was done intentionally so customers could quickly get the information they need so long as their requirements fell within a well-defined set of constraints. A design goal of the customer calculator was to ensure that no engineering outputs are produceds if customer specifications fell outside these imits. The system is also designed so that all outputs are cleared immediately when any input field is modified. This prevents confusion that would arise if a user changed the inputs after a calculation and then printed the page.

The system is developed using object-oriented techniques. this provides very tight interfaces and lays a firm foundation for enhancement. In particular, it could be extended to provide the funcitonality of the internal spreadsheet. By doing this, both customers and engineers could have calculators customized from the same code base and neight would have to rely on platform specific tools such as Excel.

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