Hi, I understand you explanation about this, but for our particular case it would be difficult to use incremental value as the physical summary shows the cumulative values, in this case we would need to look for previous physical sources and compare with the current one and calculate the incremental value, this would spend time. May be you can help me a simple javascript to perform that.
Cheers, João From: Jim Grace [mailto:[email protected]] Sent: 14 May 2015 16:22 To: Joao Mazuze Cc: dhis1-users Subject: Re: [Dhis2-users] Surveillance rules Thank you, Joao. Others may be able to speak to this better than I, but validating cumulative data values may not be a strong use case for a DHIS 2 feature. The DHIS 2 documentation generally advises against collecting cumulative numbers in data elements. See for example https://www.dhis2.org/doc/snapshot/en/implementer/html/dhis2_implementation_guide_en_full.html#d3287e894 Instead, it is recommended to collect only the incremental number that is added during a time period. This allows a single data value to be entered -- the count for that month -- and it can be analyzed in DHIS 2 both as a new count and a cumulative count through time. See for example the use of indicators to represent cumulative data in https://www.dhis2.org/doc/snapshot/en/implementer/html/dhis2_implementation_guide_en_full.html#d3287e965 Cheers, Jim On Thu, May 14, 2015 at 9:33 AM, Joao Mazuze <[email protected]<mailto:[email protected]>> wrote: Yes Jim, these values are cumulative, that´s why we have to compare with previous period to avoid user data entry errors. We have often got many problems when analysing data in our reports because of user entry errors, so we think this feature will solve this, comparing before post and alerting the user if the value entered is lower than previous one. Cheers, Joao From: Jim Grace [mailto:[email protected]<mailto:[email protected]>] Sent: 14 May 2015 15:24 To: Joao Mazuze Cc: dhis1-users Subject: Re: [Dhis2-users] Surveillance rules Hi Joao, Can you say more about the semantics of what you want to compare with past periods? For example, are these cumulative values? What do they measure? The reason I ask these questions is to understand better the potential usefulness of adding this feature to DHIS 2. If you have a compelling use case, and if it is consistent with the philosophy of how DHIS 2 is used, then it will add more weight to this feature as we compare its priority to other possible enhancements. Cheers, Jim On Thu, May 14, 2015 at 9:08 AM, Joao Mazuze <[email protected]<mailto:[email protected]>> wrote: Hi Jim, Of course I was trying to validate in an input form. In my own case I have a set of data elements that after entered current period values for this data elements we have to compare with the respective immediate previous period values as in our scenario will not make sense when user enter greater values for the current period when compared to previous. That’s why I tried to create an example on the demo site as described on my last email, but unfortunately did not work, even when running “validation rule analysis” after assigned to “validation rule group”, called Testing. Kind regards, Joao From: Jim Grace [mailto:[email protected]<mailto:[email protected]>] Sent: 14 May 2015 14:53 To: Joao Mazuze Cc: dhis1-users Subject: Re: [Dhis2-users] Surveillance rules Thank you Joao. Were you trying to use this validation rule to validate data in an input form? Surveillance-type rules are not designed to work this way. They are used after data entry to look for patterns in the data, when added to a validation rule group and run under "Validation Rule Analysis". If you were trying to validate data against previous values, I would like to know more about your use case. Can you say more about what the data elements are, and how they should relate to previous periods? Cheers, Jim On Thu, May 14, 2015 at 8:30 AM, Joao Mazuze <[email protected]<mailto:[email protected]>> wrote: Thank you Jim, Here is the problem´s background: We need to compare current period value from previous one (monthly period) as the current one it is mandatory to be greater than other. In this case on the demo system I made an example for Bumban MCHP org unit, comparing between March 2015 and April 2015 for dataelement “BCG doses given (<1y)”, for any value applied to this dataelement the validation always passes successfully, what is strange, the related surveillance rule is called “testePreviousPeriod”. Our goal is to be able to compare those monthly periodical datavalues. Kind regards From: Jim Grace [mailto:[email protected]<mailto:[email protected]>] Sent: 14 May 2015 14:15 To: Joao Mazuze Cc: dhis1-users Subject: Re: [Dhis2-users] Surveillance rules Hi Joao, A surveillance-type validation rule should work as you say, comparing the current values of the left side with previous values of the right side. I don't know why you aren't seeing this behaviour. When you create a new surveillance-type validation rule, be sure to give a non-zero "Sequential sample count" to compare with periods immediately preceding the current period, and/or a non-zero "Annual sample count" to compare with the same period in past years. If you choose both, it will compare the current data with a range of sequential periods in this year and in past years. If this is not the problem, I would need some more information to understand better your situation. If you can reproduce the problem on the demo system https://apps.dhis2.org/demo/, or on another system to which I can be given access, that might help the most. Cheers, Jim On Thu, May 14, 2015 at 4:22 AM, Joao Mazuze <[email protected]<mailto:[email protected]>> wrote: Hi guys, I know that surveillance rules compare data from previous periods with the current one. Now I need to compare data values from the same data elements(left and right side), but the rule ignores the previous value and compares only the current value itself which doesn´t make sense as surveillance rules compare current values with previous ones. How can I solve this? Kind regards, João Kind regards _____________________________________ João Gabriel Mazuze National Database Manager Projecto CHASS-SMT Abt Associates Inc. Av. 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