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Data quality report

Uno_Welwyn Garden City_St Albans_20190518_6

• Please find your data quality observations below.
• What are the different type of observations?
• Download data quality report.csv

100

Bus lines

94%

AMBER
Data quality

209

Critical observations

69

Advisory observations

Contents

Critical observations (209)

These observations are considered critical in terms of data quality. An operator should aim to have zero critical observations in their data.

Timing (165)

Number of observations	Observation category
141	Fast timing between timing points
8	First stop is not a timing point
16	Last stop is not a timing point

Data set (44)

Number of observations	Observation category
44	Missing block number

Advisory observations (69)

These observations suggest there may be an error in the data. However, for some types of services these may be intended by the operator. Advisory observations should be investigated and addressed. If the observation is a result of intended behaviour, an operator can suppress the observation.

Stop (34)

Number of observations	Observation category
31	Missing stops
3	Stop(s) are not found in NaPTAN

Timing (27)

Number of observations	Observation category
1	Fast running time between stops
26	No timing point for more than 15 minutes

Journey (8)

Number of observations	Observation category
4	Expired lines
4	Journey overlap