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How Do We Ensure the Highest Quality in Data Annotation?

6+
years experience with various projects
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6+
years experience with various projects

What is Quality Control Department?

To ensure the highest quality annotation, Unidata employs a unique approach to quality control. Each project’s validation is handled by a dedicated department, the QCD.

The Quality Control Department includes validators who check the annotations and provide reports to the team leaders.

Why is the QCD necessary?

The Quality Control Department is essential for timely quality management on the project. We validate the data from the previous or current day every day, allowing us to take prompt action, such as addressing problematic cases with performers, providing additional training, or discussing the technical assignment with clients. This helps us consistently guarantee high annotation quality.

Validators also work with team leaders and act as analysts. By processing large volumes of data, they can notice patterns, anomalies, or deviations in the project and send the appropriate reports to the team leaders, which helps reduce decision-making time.
Therefore, the QCD is an integral part of every Unidata project.

QCD Work Stages

What Does QCD Expertise Consist of?

It consists of five main points: testing, speed, consistency, re-monitoring, and error rate of appeals. Based on the analysis of these criteria, we can manage the department’s work: hire or remove validators from the project and clarify necessary points during meetings.

Testing

For all projects lasting more than two weeks, we conduct testing. It includes 10 to 20 questions about the project's technical assignment.

Speed

The QCD affects the project's completion speed because all data requires validation. The sooner all necessary data is validated, the faster the project can be completed. Therefore, the Quality Control Department has speed metrics to ensure projects are delivered on time and without delays.

Consistency

It is important for us to maintain a level of uniformity in resolutions for the same case, so we evaluate consistency. For this, we give the same case to different validators on the project for independent resolution. Team leaders, experts in the technical assignment, also participate in this metric by annotating the same case.

Error Rate of Appeals

It's crucial for us to check if there were any appeals by the team leader regarding errors found by the QCD, and if so, how many were successful in confirming QCD's errors. This metric is really important as it affects the error rate on the project and takes time of all participants in the appeal process.

Individual Approach

At Unidata, we offer the client an optimal approach to quality assessment on their project, considering the budget, required accuracy, and task specifics. The proposed approach is just an option, and the client always has the opportunity to accept it or make a counterproposal.

Re-monitoring

To control the QCD's quality, re-monitoring is performed. In each project, we review responses for each validator, checking their actions, whether cases are correctly confirmed, and if they are aware of the latest updates. We also check each validator for the largest group of errors on the project and previous errors. It's important for us to ensure that planned adjustments are successfully made and that the validator correctly interprets such cases.

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Very good experience

We got in touch with UniData to buy several datasets from them. Communication was very cooperative, quick, and friendly. We were able to find contract conditions that suited both parties well. I also appreciate the team's dedication to understand and address the needs of the customer. And the datasets we bought from UniData matched with our expectations.

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