Let's say you want to lose weight. Your goal is to weigh 5kg less in 3 months. You can measure your progress in two ways: either monitor your weight every day, or verify that you're following your chosen plan to lose weight. These plan could be counting calories, exercising, or anything else you find effective. The first measurement is called a lag measurement, while the second one is a lead measurement. What is the difference between them and why should you use both of them? Keep reading to find out.
- Lag measurement allows you to see how close you are to reaching your goal. In our example, it would be your weight. If you want to lose weight, you can weigh yourself every day/week and immediately see how far you are from your goal.
- Lead measurement is all about making sure you are following your plan. When you define a goal, you should also prepare a plan for how to achieve it. (Check out post about SMART goals) The plan is a strategy for achieving your goal. The information you get from this type of measurement tells you if you are doing what you need to do in order to reach your goal.
I will give you an example to describe the difference even further. Let’s say your goal is to write a twenty-page article. You want to finish it in three weeks. You plan to do research for one week and then write the article for two weeks. You told yourself that you will write two pages a day.
- Your lag measurement would just be checking to see if the article is ready or not, and how many more pages you have to write.
- Your lead measurement would be checking every day to see if you are acting according to your plan. After one week, you can verify whether or not your research is done. If it is, you can continue with your plan. If not, you know you have to adjust your plan and write more pages a day in order to be ready by the deadline. The same thing goes with monitoring whether or not you are writing two pages a day. If in five days you’ve only written 3 pages, you immediately know that you have to write more than two pages each day in the following days.
If you only have lag measurements, you only know that you haven’t reached your goal yet. When you check if you are following your plan you know what the chances of reaching your goal are. You can adjust your plan if something goes in the wrong direction.
These are two simple examples to visualize lead and lag measurements. I use these methods in my most important projects. I cannot overstate the importance of knowing how I’m doing and what I have to do to reach my goals by a certain deadline.
Do you use both types of measurements? Do you think it’s worth doing so?