rting period or where an assessment was not required. 1.10 Year on year checks Year on year checks are built into COLLECT and applied to a number of the headline measures and the number of child records in the return. The checks compare the data in the current data collection and to that in the previous year. Substantial increases or decreases between the current and the previous year will be highlighted within the COLLECT error counts report. The year on year checks are described and defined below: 22 Year on Year check Description Definition YonY 01 Number of children: checks the number of child records included in the return against the number returned in the previous year. Count of all child records within the collection year. Calculate percentage change in the number of child records compared to last year. The check will appear if there is a percentage increase or decrease of 15 per cent or more. YonY 02 Number of referrals: checks the number of referrals included in the return against the number returned in the previous year. Count of all referrals within the collection year: Count of records where ReferralDate >=01/04/2023 and <=31/03/2024 Calculate the percentage change in the number of referral records compared to last year. The check will appear if there is a percentage increase or decrease of 25 per cent or more. YonY 03 Number of assessments: checks the number of assessments included in the return against the number returned in the previous year. Count of assessments with an assessment authorisation date recorded within the collection year: Count of Assessment records where Assessment Authorisation Date is >= 01/04/2023 and <= 31/03/2024 Calculate the percentage change in the number of assessment records compared to last year. The check will appear if there 