My Opinion is Louder Than Yours!
Opinions are great. They are an essential part of an improvement effort. But, when decisions are solely based on opinions and especially when they are based on a limited number of opinions, it can lead a team astray. Teams that operate this way fall into the trap of confusing activity with improvement. Sort of like rearranging the deck chairs on the Titanic. It doesn’t matter – this ships going down!
Sure, finding the right data can slow things down a bit, but...
There is a difference between obvious decisions and ones that need more data to point in the right direction. I don’t think anyone would need to collect data before replacing a roll of toilet paper on the hanger. You can see the bare cardboard tube; you know it is gone. That’s all the data you need. Hang the new paper.
But when someone is making claims like, “this happens all the time” or “it’s gotten really bad” – that’s your indicator. Does it happen all the time? Like, every single time? Most of the time? A lot this week?
Translation: If the problem is obvious and the solution is simple - just fix it. But, if the problem is vague and you’re not really sure - go grab some data.
Wouldn't it be nice to know before we start trying to fix it?
When I hear these indicator words (always, never, a lot, quite a bit, etc.) I like to use what I call the 12-15 guideline. This method provides a measurement baseline that is quick, simple, and effective at providing a general idea of past performance.
- Find data for the last 12 “periods” and randomly select 15 data points for each period.
- Calculate average values for each period.
- Plot the average values in time series order (the sequence in which they occur).
Performing these simple steps will make it easy to see any trends or outliers, and understand the magnitude of the problem. (Check out the helpful links at the bottom for assistance on steps 2 and 3.)
But what if there is "no way" to measure your problem? Think about it. There is a way that data can describe the problem you are experiencing. Besides, you don't want to pour a lot of effort into something you "think" is a problem only to "not really know" if things are better once all of the action is complete.
Some helpful links:
Using the Average Function In Excel: https://support.office.com/en-us/article/Calculate-the-average-of-a-group-of-numbers-e158ef61-421c-4839-8290-34d7b1e68283
Creating a Time Series Plot In Excel: https://www.youtube.com/watch?v=SAgldvOtrhI