Average Sum in Org unit Hierarchy

Hi Team,
I have a data element set us Average sum in org unit hierarchy and collected on a bi weekly basis, when I select the data in the pivot table, the average values are bizarre(see attachment). Is this how the above aggregation operator is meant to work or its a bug?

rgds

David

image

Also, totals seem meaningless if you select average (it still seems to just sum up percentages for example).

Knut

···

On Mon, Nov 14, 2016 at 8:50 PM, David Muturi dnmuturi@gmail.com wrote:

Hi Team,
I have a data element set us Average sum in org unit hierarchy and collected on a bi weekly basis, when I select the data in the pivot table, the average values are bizarre(see attachment). Is this how the above aggregation operator is meant to work or its a bug?

rgds

David


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Knut Staring

Dept. of Informatics, University of Oslo

Norway: +4791880522

Skype: knutstar

http://dhis2.org

Hi David,

sounds strange indeed. We need some more info. Can you include bi-weekly periods in your screenshot so that we can see what the original captured value is?

regards,

Lars

···

On Mon, Nov 14, 2016 at 8:50 PM, David Muturi dnmuturi@gmail.com wrote:

Hi Team,
I have a data element set us Average sum in org unit hierarchy and collected on a bi weekly basis, when I select the data in the pivot table, the average values are bizarre(see attachment). Is this how the above aggregation operator is meant to work or its a bug?

rgds

David


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Lars Helge Øverland

Lead developer, DHIS 2

University of Oslo

Skype: larshelgeoverland

lars@dhis2.org

http://www.dhis2.org

Hi Lars,
Many thanks for your response, since we do not have biweekly defined as a dhis2 period type(which would be great to have), we have configured the dataset to be weekly but only that data is entered on a biweekly basis, meaning one week will miss data while another will have based on when it was collected. I have attached an excel download from the datavalues table as well as a screen shot showing the weekly periods that data is collected.

rgds

David

GR-HEA-WASH- Bathing facilities.xlsx (9.83 KB)

···

2016-11-16 14:08 GMT+03:00 Lars Helge Øverland lars@dhis2.org:

Hi David,

sounds strange indeed. We need some more info. Can you include bi-weekly periods in your screenshot so that we can see what the original captured value is?

regards,

Lars

On Mon, Nov 14, 2016 at 8:50 PM, David Muturi dnmuturi@gmail.com wrote:

Hi Team,
I have a data element set us Average sum in org unit hierarchy and collected on a bi weekly basis, when I select the data in the pivot table, the average values are bizarre(see attachment). Is this how the above aggregation operator is meant to work or its a bug?

rgds

David


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Lars Helge Øverland

Lead developer, DHIS 2

University of Oslo

Skype: larshelgeoverland

lars@dhis2.org

http://www.dhis2.org

Hi David,

the way the average+sum aggregation works is roughly this:

sum( [days in data period] X data value ) / [days-in-aggregation-period]

In other words, we take the sum of the product of no of days in the data value period and data value, divided by no of days in aggregation period.

Data value period is the period for which the raw data is collected (weekly in your case). Aggregation period is the period which is requested in analytics (monthly and quarterly in your case).

So in this case, the problem is that you capture data by weeks which in reality represent bi-weeks - this confuses the aggregation output. The holes in the data (you have many weeks without data) will pull down the average score. Based on the rules outlined the results seems correct from what I can see.

We could rather look into adding support for a bi-weekly period type.

best regards,

Lars

···

On Wed, Nov 16, 2016 at 2:24 PM, David Muturi dnmuturi@gmail.com wrote:

Hi Lars,
Many thanks for your response, since we do not have biweekly defined as a dhis2 period type(which would be great to have), we have configured the dataset to be weekly but only that data is entered on a biweekly basis, meaning one week will miss data while another will have based on when it was collected. I have attached an excel download from the datavalues table as well as a screen shot showing the weekly periods that data is collected.

rgds

David

2016-11-16 14:08 GMT+03:00 Lars Helge Øverland lars@dhis2.org:

Hi David,

sounds strange indeed. We need some more info. Can you include bi-weekly periods in your screenshot so that we can see what the original captured value is?

regards,

Lars

On Mon, Nov 14, 2016 at 8:50 PM, David Muturi dnmuturi@gmail.com wrote:

Hi Team,
I have a data element set us Average sum in org unit hierarchy and collected on a bi weekly basis, when I select the data in the pivot table, the average values are bizarre(see attachment). Is this how the above aggregation operator is meant to work or its a bug?

rgds

David


Mailing list: https://launchpad.net/~dhis2-devs

Post to : dhis2-devs@lists.launchpad.net

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More help : https://help.launchpad.net/ListHelp

Lars Helge Øverland

Lead developer, DHIS 2

University of Oslo

Skype: larshelgeoverland

lars@dhis2.org

http://www.dhis2.org

Lars Helge Øverland

Lead developer, DHIS 2

University of Oslo

Skype: larshelgeoverland

lars@dhis2.org

http://www.dhis2.org