We all want to be efficient. We want to get stuff done. We want to make the most of our time. That’s efficiency. Unfortunately, those two things are often at odds. If we take a look at doctors and firefighters, we can see that there are two types of efficiency and how they don’t always play nice together.
Seeing a Doctor
When you decide you need to make a doctor’s appointment, there’s a typical path that you follow.
- Find the contact info.
- Make the appointment.
- Wait a few weeks to a month or so.
- Drive to the doctor’s office.
- Wait in the waiting room.
- Go to the exam room.
- Wait some more.
- See a nurse.
- Wait some more.
- See the doctor.
Your goal, and the thing that gave you value, was to see the doctor. All those other steps don’t provide value per se, they’re means to an end. (Seeing the nurse is the arguable exception, as he or she is providing some of the functions that the doctor would perform.) In a month-long process, you receive roughly five minutes of value.
Getting Services from the Fire Department
When you realize you need services from the fire department, you typically follow a much different path.
- Call 911 (in America, at least).
- Talk to the dispatcher.
- Wait 5-10 minutes.
- The fire department addresses the emergency (firefighters do a lot more than just putting out fires).
In this case, taking care of the emergency is the thing that gave you value. And unlike the doctor, you spend a very small amount of time waiting in comparison to the time that you receive value from the servicer.
Two Types of Efficiency
At this point, you might be saying to yourself “Doctors are horribly inefficient!” However, don’t jump to conclusions just yet. Doctors are actually incredibly efficient. It’s just a different type of efficiency than firefighters.
Doctors are resource efficient. Resource efficiency is a measure of how much time or effort is wasted when the resources in a system are not providing value, or providing value sub-optimally. In the medical industry, doctors are a resource. In fact, they’re an expensive resource. Because of this, we make sure that doctors are using their time to the greatest extent. They’re busy from dawn to dusk. If they weren’t, they’d be even more expensive. What’s more, the risk to the patient of waiting weeks for an appointment is usually pretty minimal.
Firefighters, on the other hand, are flow _efficient. Flow efficiency is a measure of how quickly we realize value in achieving a task or, to put it another way, how quickly that task moves through the system. Much like the doctors in the medical industry, firefighters are the resource in this system. Taking care of emergencies is the flow. Because of the high importance of accomplishing their tasks, we allow for some slack in firefighters time. This slack is _resource inefficiency, but is precisely the thing that allows them to be flow efficient.
Resource vs. Flow
Unfortunately, resource and flow efficiency are usually at odds with one another. In order to maximize resource efficiency, we put a queue