Discover the OASIS app in a two-minute video!

What is the purpose of the OASIS application?

The application helps you conduct an in-depth analysis of the operations and quality of an epidemiological surveillance system using the OASIS method.

How does the OASIS application work?

First, the OASIS application proposes a simple questionnaire which you follow, step by step, to collect from surveillance system actors all of the information needed for a precise description of the system’s operations and outputs.
The questionnaire is divided into 10 sections. Each section explores in greater detail one aspect of the surveillance system, e.g., "Surveillance objectives", "Field institutional organization", "Surveillance tools" etc.
The OASIS application then proposes to score 78 criteria that synthesize all of the information you have collected. The scores range from 0 (criterion not met) to 3 (criterion fully met). 
To help you assign the most appropriate score, the OASIS application provides an online help system: as you enter a score, the movement of your mouse opens a small scoring guide. 
Once the questionnaire has been completed and all of the scores have been assigned, the OASIS application proposes to export the results of your evaluation. 

How are the results of the evaluation presented? 

The OASIS application allows you to export the results of your assessment in the form of three complementary graphs: 

  • An array of "pie charts” 
    The OASIS application allows you to automatically generate 10 pie charts which visually represent the level of satisfaction of your surveillance system with regard to the 10 aspects covered by the questionnaire. In each pie chart, the coloured portion symbolizes your surveillance system’s score compared to the maximum score for the given topic in an optimal surveillance system. The larger the portion of the pie, the better the performance of your surveillance system.

    You can then insert these graphs (in JPG format) into your evaluation report.
  • A histogram
    The OASIS application allows you to automatically generate a histogram. Each "bar" in this histogram represents the quality level of your surveillance system with regard to a specific critical point: sampling, data collection and flow, information dissemination, etc. The shorter bars allow you to identify the priorities for improvement in your system. 

    You can then insert these graphs (in JPG format) into your evaluation report.
  • A "spider web", also known as a "radar” chart
    On this graph, each axis represents one of the criteria defined by the World Health Organization (WHO) to evaluate the quality of an epidemiological surveillance system: representativeness, reliability, acceptability, etc. This graph allows you to easily visualize your system’s strong points and weak points.

    You can then insert this graph (in JPG format) into your evaluation report.

Can the OASIS application help me prepare my evaluation report?

Yes, the OASIS application also allows you to export other data you have entered during your evaluation work: the list of people interviewed during your survey, the final recommendations, etc.

Can I use the OASIS application without prior training?

Technically, yes, you can create an evaluation immediately. The OASIS application is freely available. 
However, it is strongly recommended that you first follow a training course in the OASIS method.
This can be done:

  • Face-to-face, with the help of a trainer. If you would like more information on the training courses available, please contact the following email address : contact[at]
  • Through self-paced study via our OASIS online training, which we have created especially for OASIS users. To access it, simply go to CIRAD's Prisme online training platform (, create a free account on the platform ( and then access the training module ( Please note that to access the entire course, you will need to complete the "Registration" questionnaire in the OASIS module. In this course, you'll find numerous examples of concrete applications, testimonials, videos, exercises, etc. The total duration of this self-training course is around five hours. You can, however, consult only the chapters that interest you the most.