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Activity Sampling Exercise

8balluk

Starting to get Involved
#1
Hi All

I've completed an activity sampling exercise within an office environment. We completed 5 days worth of observations at random time intervals ranging from 9 to 15 minutes, therefore have a decent data pool and in some cases good 'error of margin' %.

There are 5 departments results are as such

A - VA 18%, NVA 32%, BENVA 34%, Not Working 16%.
B - VA 10%, NVA 38%, BENVA 48%, Not Working 4%
C - VA 1%, NVA 33%, BENVA 51%, Not Working 15%
D - VA 3%, NVA 18%, BENVA 76%, Not Working 3%
E - VA 38%, NVA 11%, BENVA 34%, Not Working 17%

I'm interested in if there has been any papers written so i can compare this data to some sort of 'standard'. I'm particularly interested in the 'Not Working' aspect as some of those %s look quite high but in reality in may be acceptable.
 

8balluk

Starting to get Involved
#3
Sorry posted in the wrong area.

Can someone post in Lean Manufacturing please. I dont know how to.

Value Add, Non Value Add, Business Essential Non Value Add
 

8balluk

Starting to get Involved
#5
im unsure what i can make clearer.

Department A - Spent 18% of their time on Value Add Activities
32% spent on Non Value Add Activities
34% on Business Essential Non Value Add Activities
16% was observed not working

over an observed working week

and so on....................
 

Jim Wynne

Staff member
Admin
#6
im unsure what i can make clearer.

Department A - Spent 18% of their time on Value Add Activities
32% spent on Non Value Add Activities
34% on Business Essential Non Value Add Activities
16% was observed not working

over an observed working week

and so on....................
That explains it. There are no standards or papers that I know of. That's because the different classifications might (a) different in various organizations and (b) there might be questionable classification being done. A lot depends on local definitions of the categories.
 

Bev D

Heretical Statistician
Staff member
Super Moderator
#7
Jim is correct - there is no standard. In lean there is no such thing as good enough or average. The point is to eliminate all NVA and waiting (not working) so that work flows. continual improvement is the goal. And remember that you are better off having people not working than working on something that is not needed now (over-production).

And remember that it isn’t so much about whether or not ‘the people’ are working but is the ‘work’ flowing...
 
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