Sir Ronald Aylmer Fisher FRS
If you haven’t learned to fear adhesive bonds, you haven’t lived a complete medical device life. Adhesives are truly marvels of transmutation: liquids stay liquid until they magically become solid, and a drop or two of base substance can hold dissimilar materials together with superhuman strength.
Yet control of adhesive processes is always a nightmare. UV fluence or position changes from lamp-to-lamp, and oven temperature varies seasonally. The environment is always too damp or too dry. Dispenser accuracy varies. Somehow the location of your adhesive on today’s device has shifted slightly from last year’s location. With adhesives, you just never know which variable is going to cross the line from in-control to out-of-control. You don’t need a masters in statistics to see that a large number of low-probability process failures adds up to a higher-than-desirable probability of bond failure.
I routinely bore people with my assertion that everyone should be required to study and master statistics in high school. We all need statistics to better understand the world we live in and the news we read. Without statistics literacy, we can easily be misled. In our personal lives, we make financial investments, buy insurance, and make decisions with risks. At work, engineers and scientists need statistics to understand designs, processes and experiments. Sales and marketing people need statistics to understand market attractiveness and sales probabilities. Supply chain and operations experts need statistics to understand forecasts, materials plans, and manufacturing processes. Even accountants and finance types need statistics to understand currency risks, stock options, and financial instruments.
Star medical device engineers master statistics to make better designs in less time. How? Continue reading →
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