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An x-bar and R chart is used to monitor a process. One week ago a new type of raw material was introduced and since that time 60 points have been plotted on the xbar chart and all are in the middle third of the chart. The corresponding 60 points on the R chart are all below the average range. This indicates that:
Suggested Answer: C
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13 comments · newest first
CH
Chauncey
11 months ago
Agree, recalibrating the gage might be necessary too.
PA
Pamella
11 months ago
Wait, all points in the middle third? That can't be right.
AL
Allene
12 months ago
I think the operator is just plotting it wrong.
ER
Erinn
12 months ago
Definitely time to recalculate the control limits!
AR
Arletta
12 months ago
Seems like the points are all clustered, that's odd.
AL
Almeta
1 year ago
This reminds me of a practice question where we had to decide if the control limits needed recalculating after a change in materials. I think that might be relevant here too.
GE
Gearldine
1 year ago
I think if the R chart points are all below average, it might suggest something's off with the measurement system, but I can't recall if that means recalibrating the gauge or something else.
LA
Lashanda
1 year ago
I remember we discussed how consistent points in the middle third could indicate a lack of variation, but I'm not sure what that means for recalibrating or recalculating limits.
DO
Domitila
1 year ago
I feel like asking the material manager to switch back could be a drastic step, but if the new material is causing issues, it might be worth considering.
LO
Loise
1 year ago
Okay, I think I've got this. The two main use cases are option A, for team development and distribution via the AppExchange, and option D, for deploying a custom app from a sandbox to production using the Metadata API.
LA
Lai
1 year ago
I'm not totally sure about this one, but I think the first department store was probably in a major city like New York or Chicago. I'll have to think it through carefully.
BR
Breana
1 year ago
Ah, I've got this! The difference between the flexible budget and actual revenue must be the revenue variance. I'll write that down confidently.
SH
Shawna
1 year ago
Okay, let's see. I think the key is to promote variability in the teaching environment and stimuli, rather than keeping things constant. So I'd go with option A - "teach loosely."