Data Check
The quality of a project’s results is determined by the quality of the data. To guaranteeing this, a whole series of measures are required in the course of a study. Therefore we have built in a tightly-meshed network of measures to ensure the quality of your data.
Check for manual data entry
For manual data entry we use a tool that was programmed in-house, which ensures that interviews are punched in sequence without any gaps. This eliminates any possibility of accidently overlooking a page of an interview. Naturally it is also possible to force single responses or permit multiple punches, and to pre-define permitted values. Data entry is carried out by carefully trained staff. The quality of your data is assured by constant and targeted monitoring of the data entry process.
Check for optical data entry
For optical data entry (scanning) we also use software that was developed in-house. This demands manual confirmation in the event that multiple fields are marked in a question that expects a single response. Implausible or improbably high or low numerical values can also be tagged for manual checking.
Check for interviews from CIS surveys
For interviews conducted with our interview software CIS there are many options for content checking, so that inconsistencies can be clarified even during the interview.
Check in tabulation software
When raw data is imported, it is analyzed by our powerful tabulation software. This performs complex checks and – where necessary – cleans the data, both case by case and globally for all interviews that meet specified testing conditions. This cleaning procedure can be reversed or modified at any time. Our tabulation software is script-based, which offers advantages not only in terms of great flexibility in tabulation and data export, but also for quality assurance. As well as the normal proofreading of the script, the data or tables are also checked against the raw data. This procedure ensures that the same results are always generated in repeated table runs.
