1. BY :
LISSY VERMA
SHRADDHA GUPTA

2.  Data Collection
 ODK : Open Data Kit
 Demo
 Usher : Improving Data Quality
 Purpose
 Implementation
 Results

3.  Data collection in developing areas is
difficult.
 None of existing tools suffice.
 Based on need, new features are needed.

4.  ODK is a tool suite for collection and
management of data on mobile phones.
 The main objective is to provide open
source tools.

5.  ODK COLLECT
 Collects Data
 ODK AGGREGATE
 Store Data, view and export.
 ODK MANAGE
 Remote Device Management

7.  AMPATH deployed the ODK for data
collection for medical purpose.
 Deployment was found to be successful
minimizing delays and improving lives of
healthcare workers and other people.

8.  Expertise in form design
 Double Entry : Costly
 Data Cleaning

9. Constraints
 Combo-boxes.
Reduce Time
 Automatically filled Leave-forms.

10. ESCORTER : Guide towards correct entries.
 Question Ordering in form.
 Greedy Information Gain
 Dynamically Reorder Questions
 Predict Errors to Re-ask.
 Contextualized Error Likelihood Principle.

11.  Concept : An unscrupulous door-to-door surveyor Shirks
Work, ask only important questions.
 Greedy Information Gain
 Uniform Prior : Equal likely inputs
 Training Set
 Context – specific Model Required
 Bayesian Learning

12.  The patient dataset collected at a rural
HIV/AIDS clinic at Tanzania.
 Survey dataset, responses from 1986 poll
about race and politics

13. Bayesian Network for the patient dataset

14. Question layout generated by the algorithm

15. Approximates Double Entry
 Uncertainty : High Entropy
 Outliers

23.  Due to digital divide between the developing and
developed areas, it is very difficult to collect and use data
in the developing regions.
 The main problems being :
Lack of reliable infrastructure,
Proper connectivity, and,
Inadequate expertise.
 Currently available tools for data collection like Pedragon
Forms, Nokia Data Gathering, Java-Rosa, RapidSMS etc.
are difficult to deploy, hard to use, complicated to scale
and rarely customizable.

24.  The Open Data Kit or simply ODK is a suite of tools for data collection that
uses Google’s Android platform.
 The main objectives of the technology are :
Modularising and customising tools
Use of open interfaces and standards
Long time survival of tools.
 The three components of ODK are:
1. ODK Collect : collects data using Forms.
2. ODK Aggregate : ready to deploy online repository to store, view and export
collected data.
3. ODK Build : enables users to generate forms.
4. ODK Voice : maps Forms to sound snippets.
5. ODK Clinic : mobile medical record system.
6. ODK Manage : maintains database of all phones for remote device
management
7. ODK Validate : validates Form.
Other tools being ODK Dropbox, ODK Rangefinder, ODK Tasks, ODK Listen
and ODK Visualise.