topic Re: Occupancy rate in QlikView

Occupancy rate

Mon, 10 Dec 2012 13:18:51 GMT

Hello QVer,

I'm calculating occupancy rates of beds per day and then it is of interest to look over calendar weeks, months aso.

I'm showcasing two charts (straight table + bar chart):

Selected are two OEFA (AMED + BMED) and the calendar week = 2+3 (equal to 28 occupancy days). The OEFA can have varying assigned beds over time.

I'm using the same formula in both charts to calculate the weighted occupancy rate:

=sum(CASES/OEFA_BETT)/count(distinct KL_DATUM)

Straight table shows the cumulated rate (94,49%) of 28 day corresponding to 2.+3. calendar week.

In bar chart I want to have the cumulated rates of selected OEFA per selected week(s) which is

2. week = 93,64% instead of the summation of 187%

3. week = 95,34% instead of the summation of 191%

In practice I'm using a set formula and I tried a lot.

Can someone help please? Thanks.

dj_skbs

Re: Occupancy rate

Mon, 10 Dec 2012 13:29:04 GMT

can you post your sample file ?

Regards,

Venkat

Re: Occupancy rate

jonathandienst — Mon, 10 Dec 2012 13:41:16 GMT

I think the problem is that OEFA is not a dimension in the bar chart. As far as I can see you have two records per day (one for AMED and one for BMED). To calculate the bar, you are dividing by distinct date, so for a week you would sum 14 records and diivide by 7, which results in 2x the correct amount which is what you are getting.

A quick workaround would be to update the expression for the chart to

=sum(CASES/OEFA_BETT) / count(distinct KL_DATUM) / count(distinct OEFA)

Hope that helps

Jonathan

Re: Occupancy rate

jonathandienst — Mon, 10 Dec 2012 13:42:58 GMT

You would probably also get the correct results if just removed the distinct from the count of KL_DATUM

Jonathan