Shop Floor Control - CONWIP Configurations
7 important questions on Shop Floor Control - CONWIP Configurations
Why should CONWIP loops not be too long?
- A long CONWIP line or loop starts to behave like a push system
- Span of control issues will arise (14.2.3)
In a CONWIP line, what measure of WIP can be used for part types requiring vastly different process times, in order to maintain a level loading?
Time required at the botteleneck.
Why is FISFO a good job order protocol to predict completion times/dates?
Because jobs will exit the line the same order they were released. So cycle times and lead times will stay pretty much the same (in a stable system).
- Higher grades + faster learning
- Never study anything twice
- 100% sure, 100% understanding
For my 1st exam I got a C. Then, I started looking for ways to learn better and I came across Study Smart. Since then I have scored a A+, A, A- and another A. I highly recommend it to everyone who wants to hear it. I am so happy with it!!
I was struggling to finish all my first-year subjects for 3 years. Then I discovered Study Smart, which helped me to finish all of them within 3 months.
Because of StudySmart, things are going well in many ways. Before, I always had study stress and no time for anything. Now I feel calm and confident (because of the program). I used to score a B, now I usually score an A or A+.
Hey Chris, I really want to thank you very much for developing the platform, I usually got around C for my exams, now I scored an A+, an A and a A- !!
Since using Study Smart, my average has increased significantly. I even completed a statistics course with a A+ while I'm bad at statistics. I took on extra courses this year, because of Study Smart. Thanks so much!
Ever since I started studying with StudySmart I passed all my exams !!! No more re-sits!! At first, I was happy with a pass and now I only get good grades. Many thanks!
I aced all the courses I studied with Study Smart. For law, I first scored a D, and now an A! I’m 100% sure that I’ll pass all the courses I study with Study Smart.
I always thought I studied well. My grades were fine. I could never have imagined that applying these study skills would have such a huge and direct impact on my grades, my speed and the pleasure I have in learning.
For the first time, I finally feel totally confident about the way I learn. I have the perfect overview and make great progress in terms of speed and the grades I get. Thanks, Chris!
I immediately started to enjoy learning again, and my grades soared. All of a sudden, everything went better. I highly recommend Study Smart to all students..
Being able to create my materials online made the process of studying so much smoother and quicker. I no longer have to spend a huge amount of my time on creating my summaries.
At first, my notes were a mess. Now I use Study Smart to take my notes in a perfectly structured way. It helps me to save a lot of time and do other things I enjoy.
Students that study with Study Smart get better grades. The system applies all the learning methods in such a way that both well-performing students and students who struggle perform much better.
Hi Chris, I would like to thank you very much. Last year I scored C on a course, and this year I got an A+ thanks to your method! Thank you very much!
The largest effect is that my child is more enthusiastic about school! Every parent wants their children to be happy at school, Study Smart made it happen.
In high school, I failed several exams, and that has really changed now. I actually needed this tool very much back then. Since I started studying with StudySmart, I haven't had any D's. My average score is now an A and those are results I would have never had in the past
With my old method, I passed only 3 out of 8 courses. Since I started taking my notes digitally in Study Smart, I have passed all my courses on the first try. For me, StudySmart takes away the stress of wondering if I will pass or not.
Thanks to StudySmart, I passed all my exams, and with better grades than before! On top of that, I have mastered a very good study method now, which I am confident will help me earn my degree.
1: What is meant by 'running a card deficit'?
2: When does it make sense to do this?
1: Releasing jobs without CONWIP cards into the line.
2: In situations where you don't want the bottleneck to starve. I.e. when a breakdown downstream of the bottleneck occurs.
What happens to a CONWIP loop when you put the CONWIP card count really high?
Then the loop ultimately behaves like a push line.
Consider a shared resource that requires 1 hour per job on routing A, 2 hours on routing B and 3 on C.
Of all jobs processed at this resource, 30% are from routing A, 40% from B and another 30% from C.
What are the average (inflated) processing times for products from routings A, B & C?
For jobs from routing A: (0,3+2*0,4+3*0,3)/0,3=6,67 jobs per hour.
For jobs from routing B: (0,3+2*0,4+3*0,3)/(2*0,4)=5 jobs per hour.
For jobs from routing C: (0,3+2*0,4+3*0,3)/(3*0,3)=6,67 jobs per hour.
Why is the assembly station in the example in 14.3.6 not treated as a shared resource?
Can assembly stations act as a shared resource at all?
It is not treated as a shared resource in the example because the assembly station belongs to both of the lines text-decorationat the same time. (You could say an assembly station processes multiple products, 2 in the example, at the same time.)
An assembly station can act as a shared resource.
This is the case when an assembly station has to assemble parts not only into one product, but when the station also has to assemble other products from another combination of lines.
Try our study magic for free
a PDF, study it super fast
- No sign up, email or credit card needed!
- AI makes unlimited flashcards
- Get unlimited quizzes and tests
- Ask AI anything
- No sign up, email or credit card needed!
- Have and keep perfect overview
- Make flashcards, notes and mind maps
- Review, test and score!
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding
