Please dont close this channel ..its important for me

Thank you for this great video.

When I enter the Low and High in Minitab (e.x. 0.5, 2) and generate the axial points, I get negative values (e.x. -0.0113446 ). It is not possible to add negative material to a chemical experiment (you cannot add negative yeast to make bread). What is the best way to adjust this number? If the smallest amount I can potentially use has a value of 0.2, can I use that? How would that impact the results of the analysis?

Thanks for a wonderful lecture. One query- how to find the number of centre run in central composite design? Please mention the formula or give some references

Hello, thank you for sharing the video. Please can I use afla=1?

@TheOpenEducator

3 жыл бұрын

Yes, you can. Check this one if you plan to use 1 for alpha www.theopeneducator.com/doe/Response-Surface-Methodology/Box-Behnken-Response-Surface-Methodology

How many center points we should take? any standards

@TheOpenEducator

4 жыл бұрын

As low as one point is fine depending on the experiment. However, it is easier to run study on the Center Point. Therefore, replicating the study in the Center Point will help us to see the "Lack-of-fit" as well as improve the power of the experiment. There is no standard for the number of replicates at the Center Point that I know use widely.

CORRECTIONS: The alpha value for the quarter fraction of 8 factors = 2.828.

In the value of alpha, I think we should multiply in 1-√2 (0.41), and the value becomes 16 de add it to 40 or we take directly the value of alpha 56.

@abdelrahmanalrafee4536

Жыл бұрын

I agree with you

Thanks for a wonderful lecture. Kindly explain the method used in determining the number centre points in central composite design? Mostly when the number is factors is 5. Please mention the formula or give some references. Thanks

@TheOpenEducator

2 жыл бұрын

You will find more here: www.theopeneducator.com/doe

what is the meaning of -0.133 in the CCD. In my knowledge this value shows lower axial point, but how i incorporate in production optimization process. please reply.

@TheOpenEducator

3 жыл бұрын

Here is the answer to your question www.theopeneducator.com/doe/Response-Surface-Methodology/Design-Response-Surface-Methodology

@preetisolanki4606

3 жыл бұрын

@@TheOpenEducator I understand all the concept. how i add -0.133 of any component(Na2Co3) in production medium?

@preetisolanki4606

3 жыл бұрын

@@TheOpenEducator thanks for rply

@TheOpenEducator

3 жыл бұрын

@@preetisolanki4606 need more details to answer your question

How can I analysis 3 data ? I mean 3 factor 3 level

@TheOpenEducator

6 жыл бұрын

Three factors (independent variables) and one response (dependent variable) would make the response surface a four-dimensional problem. You can create response surface for each level of the third factor using two other factors as independent variables, x and y, and one response as a dependent variable, z. It is possible to use program like Matlab or SAS to stack the response surface for each level of the third factor. I am not sure you can do it Minitab!

@mlab398

5 жыл бұрын

How can I design pre-requisite experiment

What does "rotating a design" mean? Why is this desireable?

@TheOpenEducator

3 жыл бұрын

We have discussed the "rotatability" on this page www.theopeneducator.com/doe/Response-Surface-Methodology/Design-Response-Surface-Methodology . Figures 7, 8, and 9 explain the rotatability, especially functional advantages for RSM.

@13579Josiah

3 жыл бұрын

@@TheOpenEducator Awesome! One thing I'm not sure on is: can we build a regression model using just a 2^k factorial design or do we have to do a response surface methodology to fit a regression model? Thanks!

Hu