"Interruption" in an interrupted time series design is instrumentation failure
Explanation:
A time series design is used for taking data over a long period of time for a specific set of data surveys and it is predetermined what measures are to be used and what time is to taken for this data, which is usually over a long period of time.
Data collected from such designs may be evaluated with time-series analysis.
It is usually the failure of instrumentation that leads to the stoppage in the data collection which is paramount to be run as smoothly as possible without any sort of stoppage.
