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Pizza Girl: Statistical Analysis of a Delivery Shift: Part 1

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Another important use of pizza: learning fractions and percentages. [Photograph: Pizza Girl]

How much time do I really spend driving during any given shift?
How much time do I spend folding boxes?
What is my average hourly rate per shift? On a delivery by delivery basis?
How much better is it to take a triple instead of a double delivery?
How much does a zero tip affect my effective hourly rate?

I often have questions like this, and the best way I could think of answering them was to track my every movement during a shift, so for three peak shifts (Friday or Saturday night) I recorded everything I was doing, from my clock-out time to the time I spent folding boxes (sometimes I feel like I do nothing but fold boxes, though as you'll see, the data says otherwise). Over the next few weeks I'm going to take that data and see what sort of useful information I can pull from it.

Here's an example of my raw data (you can view the full raw data here):

5:28: arrive
5:31: clock in
5:33–5:45: fold boxes (12 minutes)
5:45–5:48: work ovens (3 minutes)
5:48: routed
5:50: leave on delivery (11 minutes travel time)
6:01: arrive at delivery ($3 tip)
6:01: leave house (11 minutes travel time)
6:12: Arrive at store (24 minutes run time for 1 delivery)
6:12–6:15: work ovens (3 minutes)
6:15: routed
6:18: leave on delivery (15 minutes travel time)
6:33: arrive at house ($3 tip)
6:35: leave house (3 minutes travel time)
6:38: arrive at second delivery ($2 tip)
6:38: leave house (14 minutes travel time)
6:52: arrive at store (37 minutes run time on two deliveries)
6:52–7:02: work ovens (10 minutes)

I took that data and went crazy with a spreadsheet to figure out both the percentage of time I spent doing various tasks as well as the average hourly rate I made on each delivery as well as on the shift as a whole.

Before I start analyzing I want to give a few caveats:

Next week I'll go into more of a breakdown of each shift (and have a neat pie chart!), but in the meantime, to answer the first question I posed, "How much time do I really spend driving during any given shift?":

Over three shifts I spent 67% of my shift driving.

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