TechNet-21 - Forum

Ce forum est un lieu d'échange où les membres peuvent poser des questions, partager leurs expériences, coordonner des activités, et discuter les récentes avancées en matière de vaccination.
  1. Wendy Prosser
  2. systèmes d'information sur la vaccination
  3. jeudi 8 juin 2017

If you haven't seen on IAPHL, next week starts a new discussion relevant to our TechNet community. Details are below. If you aren't yet signed up on IAPHL, you can do so here:

Dear IAPHL community,

We are excited to announce the topic of our next moderated discussion, set to start on Monday June 12th--

Mind the Gap: Linking Program and Supply Chain Data.

The most recent IAPHL discussion on quantification noted that generally population/demographic data or consumption/service data are used for quantification and for supply chain planning. The discussion highlighted many of the issues and challenges that we face with having inaccurate population estimates or consumption data.

In this next discussion, we want to build on that topic to explore the potential link of supply chain data to programmatic data, and programmatic data to supply chain data, specifically for immunization programs but drawing on experiences across all program areas. Most often, Ministries of Health define immunization success by coverage rates, but coverage is based on often inaccurate population estimates for the denominator. This fundamental flaw can result in skewed estimates for coverage rates and also drastically affects quantification, as this group noted in the previous IAPHL discussion.

With this topic, we want to explore options for triangulating data to better inform immunization service delivery planning from a program perspective and thinking about coverage rates. Are there opportunities to bridge the gap between supply chain data and program data to better manage and report on immunization activities?

This discussion will be hosted by:

Chris Wright, JSI

Vidya Sampath, VillageReach

Brian Taliesin, PATH

Wendy Prosser, JSI

The IAPHL Team

IAPHL- Your Global Gateway to Health Supply Chain Management

M. Carolina Danovaro Réponse acceptée

Thank you for sharing this relevant summary. Reading this post and recent posts on vaccination beyond 12 months, reminds me of the need to better monitor delayed vaccination. Sometimes, trying to triangulate persons vaccinated and vaccines used fails to recognize that some children get vaccinated late, particularly with measles-containing vaccines (eg. MCV1 given after 12 months). It is important to take this into account when trying to reconcile the data. 

Some countries with more advanced info systems are doing a good job at tracking vaccine use in parallel with vaccination and wastage. For example, Bogota, the capital city of Colombia, has had an electronic immunization registry in place for about 10 years now and this triangulation is included. I wonder if we couldn't learn more from them. 


Wendy Prosser Réponse acceptée

Thanks to everyone for your thoughts and contributions to this discussion, Mind the Gap: Linking Program and Supply Chain Data for the immunization supply chain.

With this discussion topic, we wanted to explore options for triangulating data to better inform immunization service delivery planning from a program perspective and how to link it to coverage rates.

It reminded me of a (fun) question that needs to be asked of the group: What is the difference between an accurate forecast and the Loch Ness monster (or the 7 headed monster in Mozambique, or the wax man in Zambia, or the half goat/half human in Benin, or the mythical figure in your country)? You will have to read through this summary to find the answer to this question at the end.

This discussion sparked a lot of ideas about how to get more accurate target population numbers, data accuracy and use for better forecasting, key performance indicators, vaccine wastage rate, and even options for a better performing supply chain such as changing vial size to reduce wastage.
A few key themes that emerged are summarized here:

1. There was general agreement that demographic data used to set target populations for the immunization program are oftentimes inaccurate, particularly at the sub-national level, due to mobile populations, inconsistent growth across a country, out-of-date information, or the information is shared too late or doesn’t have the level of detail needed for catchment populations. These data may be generally acceptable when forecasting national level vaccine need; however, for sub-national vaccine distribution and resupply, inaccurate target populations can lead to stockouts or oversupply.

2. WHO describes three ways of forecasting vaccine need: population based, consumption based, and session method. Population based is most often used because of the lack of accurate data from health facilities on consumption and/or session sizes. It’s also important to recognize that the population base used for forecasting is also used for coverage estimates, and coverage rates are how a MOH and partners define success.
3. Many respondents to this discussion noted the problem of getting accurate data from health facilities. Because of this, there is an over-reliance on demographic data for forecasting. There seemed to be group consensus that improving data accuracy should be a priority. This can pave the way to use different forecasting methodology for more accuracy.

4. It was noted that as more countries begin using logistics management information systems (LMIS), data accuracy should improve. That should also go hand-in-hand with the need to adapt norms and standards for EPI. The Visibility and Analytics Network (VAN) was mentioned as a new standard for continuous improvement for supply chain management.
5. A general agreement from the group was that a good practice is to use a mixed method for forecasting based on different data sets and then to reconcile for best accuracy. It was duly noted that any forecasting method needs to be adapted to the local context and, by extension, to sub-national levels as well. Contributors also agreed that regular review and updates of forecasts are helpful; one example from a Family Planning program in Nigeria described systemic review of data that helped improve forecast accuracy.

6. Other ideas for getting more accurate population estimates included using a birth registry in the catchment area, local administrative data, other project data (such as RED/REC), and even high resolution satellite imagery that would feed back into the government system to then link to the target population for coverage estimates.
7. Wastage rate sparked a lot of interest as well from this group. It seems there is not enough data being collected to completely understand open vial wastage. Recommendations for improvement included more detailed data collection that would shine light on true wastage. Triangulation of data sources could also be a methodology to use. A mathematical model to optimally plan sessions is also available, although no one would want to plan sessions at the expense of vaccinating children.

8. There was a lively discussion on KPIs and the DISC Guidelines ( Not all respondents were satisfied with these KPIs. A couple of the KPIs tend to overlap with each other, and none of the KPIs would address the issue of maintaining stock availability at the expense of vaccinating children.

9. As was noted, there is a fundamental trade-off between cost and availability. It was suggested that cost should be included as a KPI in order to get a balanced scorecard. This should also be linked to coverage, not as an indicator for supply chain specifically but as an indicator of the success of EPI.
10. One suggestion from our colleague from Conakry to reduce costs is to look at the dose per container. In certain situations, smaller vial size for some vaccines could reduce wastage. This could also have an impact on coverage as more health workers are willing to open a vial for all children who present.

11. The final key point from this discussion is related to leadership and governance and the importance of leaders and decision makers being willing to change. If different forecast methodologies or triangulation of data need to be applied at sub-national level in order to have more accurate forecasts, that needs to be recognized by national level leaders in order to feedback into planning, national forecasts, and coverage estimates.

And so now, the answer to the fun question: What is the difference between an accurate forecast and the Loch Ness monster? The Loch Ness monster has actually been seen!

Thanks again for all of your contributions. We hope this discussion has sparked some ideas for different ways to triangulate data, improve its accuracy, and benefit both supply chain planning and coverage rate estimates.

Chris, Brian, Vidya and Wendy


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