 Hello, everyone. Welcome to our third life event in S1X supply chain fundamentals. I am Inma Borrella. I am the course leader of this course along with Sergio Caballero. And I have the pleasure to be here today with Dr. Chris Cappis. Chris doesn't need any presentation because he's been with you in every lesson of S1X. He is the executive director at the MIT Logistics and Transportation Center, and he is the instructor of our course. Today, on our life event, we will focus on solving a problem from practice. This is a problem one of your fellow learners sent to us. She is facing this problem today at her company, and we will help them to solve it. So let me explain you the agenda of this event. It will be as follows. First, Chris will talk a little bit about this new idea we're introducing today, problems from practice, and he will explain the problem we will be discussing today, and he will address a question to you. After that, we will invite you to join the breakout rooms to discuss with your peers about the possible solutions to this interesting problem. And we will also launch a live poll at the end of the breakout rooms, so you can vote for the answer you believe is the correct one. The link to this live poll will be shared with you in the chat. After the breakout rooms, that will take around 15 minutes, Chris and I will discuss some possible approaches and solutions to the problem. And finally, Chris will share with you some final thoughts to wrap up EC1x, and he will share with you also some good reasons for you to enroll EC2x that very conveniently opens tomorrow. So, Chris, that's all yours. All right. Thank you, Inma. So, we introduced this concept based on just talking to a bunch of you learners, and it seemed like you were faced with a lot of different problems. And so, some people would email us problems, and so I decided to make it part of the course. The first time we had this, you guys have probably seen the practice problem where we talked about fertilizers in Africa, where we wanted you to figure out a news vendor problem, essentially. And that came from an organization in Africa who was doing work, and they emailed us, and I thought it was an excellent problem, so I put it on the final exam, and it was one of the hardest problems that people had. They did horribly on it, which was good, because it was testing whether you knew something and it was a real problem. So, we were recently contacted by Mai Zhang from Timbuktu, and she had a really interesting problem she sent, and I said, you know, we should probably incorporate this as part of the regular part of these classes, because each of you, you're going to go out to a job, and you're going to have these real problems in practice, and they're not all going to come to you and say, okay, do an EOQ, here's the D, here's the cost of holding, and all this stuff. Sometimes, the hardest part is knowing what to solve, knowing the approach and collecting the data, because you really can't collect the data until you know how you're going to solve it. And so, I wanted to introduce some kind of these real problems that have the ambiguity of real life, but not make them so ridiculous that you couldn't focus in. And so, I decided to use Mai's as a first cut for this, and I'm calling them problems from practice, and so what we're going to do is introduce these more and more, and this is a call to all of you. If you have a certain problem from practice that you think would be interesting to demonstrate one or more of these concepts, or you don't know how to solve it, send me an email directly, outlining what the problem is and what you know and what you did as a first step. Don't ask me to just solve your problem. Show me what you did first. And so, that's what we're trying to do, and we'll introduce these into all of the classes, because each of the five classes has different aspects and areas that are covered, and so they are aligned to different problems you find in practice. SC0 will be more methodological. SC1 is more problems like this, where you're looking at inventory, lead time transportation, it's really an intertwined problem. For SC2X, if you continue on, it's all about network design and some finance questions, and then for SC3, it's more about global situations, disruptions, regulations, things along those lines, and SC4X is about scale, large scale systems, and so each of the courses has a distinct area where you might have a problem in practice. So, again, just send me those problems as they come up. And now let's talk about the problem. Is that okay? Yeah. All right. So, I called it Clark Pax, and this is an actual picture of it, and so you have it, hopefully you have this, it was distributed, it's available, so I'll hold it. Can they see that, Arthur? Is that close? That's the Pax, that's the Clark Pax that should be there. And so, the question that we really have, this is a piece of the larger question, because I had a much more complicated problem, and I'll get to that after the break, but I kind of condensed it into one major problem. So, I'm going to hold this up, and Arthur, you tell me if this is close. So, the whole thing is we have these bags that can be shipped from somewhere in the Pacific Rim, San Francisco, and there's two ways of doing it. One is ocean, and one is air. Ocean takes 40 days, air takes 10. Now, air, that might sound slow for air, but do you think customs, and there's more than just the transportation involved in there? But anyway. So, the question is, it's been five days since ocean left, and we have a certain inventory on hand, and the question is, should I ship another shipment by air, or should I just wait for the ocean one to go? And that's the basis of the question that we're trying to find out. I kind of condensed a larger set of questions into this simple one. And so, I gave a bunch of other details on what you should consider the inventory on hand. I think it's 102 bags, expected demand, 74 per month with the same deviation, and it looks like it's normal over the course of a month. We gave you the cost for bags for landed, for ocean and by air. It's a $15 upcharge per bag if you ship it by air, and then they'll give you a holding rate, selling price, the lead time for ocean and air, and then the remaining time. So, the question that we posed to you guys is, should you ship something by air, and if so, how much? So, what I want to do now, if you're okay, is to send you to your breakout groups, give you 15, maybe 20 minutes, we'll see how the discussions go, to discuss this, and what I want you to do is come up with that one answer, should she ship anything now by air, and if so, how much? But also, think about the approach, because I want you afterwards to go to the poll and say what you do individually, you don't have to do that as a breakout room. You can do it individually. And then, afterwards, I'd like you to also send me by chat to this, what your thoughts are about different approaches, or how you did your approach. Because that's what we want to talk about. We're not going to get an exact answer here. I doubt we will. But we want to talk about the approaches that you took, because not everyone will take the same approach, and they're not all wrong. So, with that, if the breakout room is ready, anything else you want to say? Thank you.