Baby not sleeping well? Design of experiments to the rescue!
Inna Ben-Anat of Teva Pharmaceuticals used experiment design to help figure out what was affecting her daughter's sleep.
DOE (design of experiments) certainly helps make the world a better place in big important ways, but it can also add to your personal quality of life. In addition to the practical and clever experiment designs that developers Ryan Lekivitz and Melinda Theilbar have recently discussed here in the JMP Blog, here is another one we hope will inspire you.
This DOE example comes to us from an enterprising mom who also happens to be Director of Global Quality by Design Strategy and Product Robustness at Teva Pharmaceuticals, Inna Ben-Anat. She has used this in one of her DOE training sessions and kindly agreed to let us share her findings.
Her 6-month-old daughter was waking up as many as eight times at night, and Inna wanted (and needed) to get better sleep. Her main response was how many times she woke up at night using these factors over a 19-night study:
Length of nap(s) during the day
Last feeding: fruit/veg
Total ounces of night bottle feeding
Time of bowel movement
She found that the most significant factor was the mattress! She had bought a new mattress with less rounded edges so her daughter wouldn’t slide to the sides. She also found that no bath, no leaky diaper and night feeding were important factors as well. Here's Inna’s humorous conclusion: Have the baby hungry and not clean. But seriously, the new mattress made the difference!
She even has success to report for her “generation II” implementation for her now 8-month-old son’s feeding and sleeping schedule for his first weeks in daycare. These are Inna's control charts below:
They called him a cat-napper in daycare, and we can see why. We can also see that the first day of daycare, he went on a hunger strike, but then his appetite took off on subsequent days. It looks like her son's transition to daycare was successful, but kudos to Inna for collecting some data "just in case" there were any issues.
Thanks to Inna for sharing these great examples. I applaud her practical problem-solving skills!
For even more and varied DOE examples, check out the more than 100 example experiments used in teaching at Curious Cat Management Improvement -- and please feel free to tell me about your own!