Crime Data

Tabled: 5 September 2018

Appendix B. Business rules for performance measures

Definitions for quantity performance measures

To calculate Victoria Police's quantity measures for the Victorian Budget Papers, the rule is the total offence counts for the division (such as crimes against the person) divided by the estimated resident population (ERP) in Victoria multiplied by 100 000. Figure 1C shows the BP3 measures. The BP3 measures use a count of all 'division A' offences for the three measures of crimes against the person, while the three measures of property crimes use a count of all 'division B' offences.

The rule is represented as:

Offence rate = (offence count / ERP count) x 100 000

The ERP is the official measure of Australia's population based on the number of people who usually reside in Australia regardless of citizenship status. It is based on the results of the census and adjusted for net undercount. ERP is compiled as at 30 June each census year and updated quarterly between censuses. CSA downloads ERP figures annually.

The quantity measures relating to property and deception—excluding crime related to family violence—are calculated as the total count of property and deception offences with a 'no' family violence flag, divided by ERP then multiplied by 100 000.

For the quantity measures relating to property and deception offences—including crime related to family violence—the calculation is the total count of property and deception offences with a 'yes' family violence flag, divided by ERP then multiplied by 100 000.

Definitions for timeliness performance measures

To calculate results against the timeliness measures—the proportion of crimes resolved within 30 days—a similar method is used as for the quantity measures. The numerator for the equation is a count of all offences with a timely resolved outcome within 30 days. The denominator is the total offence count. The rule is represented as:

Proportion of person/property crimes resolved within 30 days = (count of offences with a resolved outcome in less than or equal to 30 days from the report date to the result date / total offence count) x 100.

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