Bagels and just in time delivery

Sorry, we’re closing.

You have bagels?

We will in the morning. We don’t make them here. It’s not economic. We have no space.

I need them early. For breakfast. By eight.

You’ll have ‘em. Delivered fresh every morning at seven.

Sure?

Sure. We run JIT.

JIT?

Just in Time. TC equals Q times kc over 2 plus D times K over Q.

Which means?

TC is the total cost, Q is the optimal order size, kc is the cost of carrying one unit of inventory, D is the demand…

OK, OK, are you a bagel shop manager or an economist?

I am a Japanese bagel shop manager. I worked at Toyota before. I learned to make cars just in time there, now I apply it to bagels.

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