• I have calculated the Z score as it represent the probability by considering X=70
    Z= 70-39/7= 4.42
    Now, in order to calculate variance for personal transportation I have done 1-Zscore= 1-4.42=3.42.
    So we should deduct 3.42 in order to increase their chances to come on time using personal transportation.
    Am i correct? 1 year, 5 months ago

  • @KatieBarry this is not a home work question. I am not asking for a complete solution but a general approach. May be my understanding of concept is weak but that not make my effort less. I have tried several approach which includes following :

    I have tried by calculating the z score for the people using personal transport by assuming n= 70.

    Also…[Read more]

  • According to a manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work when they use their personal vehicles for their office commute while management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed…[Read more]

  • Gotcha!!!
    For overall process DPMO : 10+17/[(500*15) + (1000*5)] *1000000 = 27/12500 *1000000 = .00216* 1000000 =2160.

    Thanks Aaron.
    Will asking for further doubt ;-)
    1 year, 5 months ago

  • I tried but got confused with the defectives. Following is the steps which I have done:
    For servivce A:
    DPMO:10/(500*15)*1000000= 1333.33

    For Service B:
    DPMO: 17/(1000*5)*1000000=3400

    For overall process: 1333.33+3400=4733.33

    Please suggest am I doing it right.
    PS: This a practice test question and I got stuck because it answer is
    2160. 1…[Read more]

  • Consider a company that provides two services using the same basic process. Service A is relatively complex, and can be defective in 15 different ways. Service B is relatively simple, with only 5 possible defects. The company produces 500 units of A and 1000 units of B. A total of 10 defects are experienced in product A and 17 defects are…[Read more]