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Pick up the correct process capability value

Food served at a restaurant should be between38°C and49°C when it is delivered to the customer. The process used to keep the food at the correct temperature has a process standard deviation of2°C and the mean value for these temperature is23. What is the process capability of the process?

A. Cp=5

B. Cp=1.66

C. Cp=0..88

D. Cp=1.22

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Question ajoutée par LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)
Date de publication: 2015/01/30

I believe the answer is choice (C) 0.88

 Cp = ( USL - LSL) /6*STD = (49-38)/6*2 =11/12 =0.92

Utilisateur supprimé
par Utilisateur supprimé

Agreed with the answer given by Mr. Ayoub  Tartir 

جعفر هندي زين السقاف
par جعفر هندي زين السقاف , "Certified trainer by the Yemeni Engineers Syndicate." , Engineers Syndicate

Agreed with Mr. Ayoub Tartir answer

Mohamed Galal Hussein Ahmed Mohamed
par Mohamed Galal Hussein Ahmed Mohamed , Technical Mnager , Fast Building Contracting Co.

I agree with Mr.Ayoub's answer

Anil Kumar Kavumkottu Padmanabhan
par Anil Kumar Kavumkottu Padmanabhan , Site Manager, Land Surveyor , Raj Associates

Cpk is an index (a simple number) which measures how close a process is running to its specification limits, relative to the natural variability of the process. The larger the index, the less likely it is that any item will be outside the specs.” Neil Polhemus

LABIB KOOLI
par LABIB KOOLI , Director of the Sectoral Center for Training in Hotel Technologies at Southern Hammamet , Tunisian Vocational Training Agency (ATFP)

This is how to calculate the process capability 

Cp is the ratio between the customer acceptable tolerance and6 standard deviations.

The customer tolerance is the differennce between the Upper Standard Limit and the Lower Standard Limit.

Then in our case , Cp= (49-38):6 x  2=11:12=0.91 

Vinod Jetley
par Vinod Jetley , Assistant General Manager , State Bank of India

D. Cp=1.22

should be the correct answer.

VENKITARAMAN KRISHNA MOORTHY VRINDAVAN
par VENKITARAMAN KRISHNA MOORTHY VRINDAVAN , Project Execution Manager & Accounts Manager , ALI INTERNATIONAL TRADING EST.

answer option >>>>>>>>>>>> D. Cp=1.22

Nasir Hussain
par Nasir Hussain , Sales And Marketing Manager , Pakistan Pharmaceutical Products Pvt. Ltd.

You are an expert, I am endorsing your answer Mr. LABIB KOOLI

Saiful Islam Hiron
par Saiful Islam Hiron , Site HR Manager , Handicap International

Agree with Tartir ................................................

Muhammad Usman Tariq
par Muhammad Usman Tariq , Visiting Faculty , National University of Science and Technology

With the above given conditions using the upper limit, lower limit, mean and standard deviation the potential Cp is0.917 and the actual CpK is2.5.

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