KPI027 | Port state control detention V4.0

Key Performance Indicator

This KPI expresses the ability to complete PSC inspections without incurring a detention (code 30).

Interpretation	The KPI is a simple counter of the number of PSC inspections resulting in a detention. By aggregating the KPI Values for all ships in the fleet, taking into account the total number of PSC inspections and the number of ships in the fleet, the fleet's detention rate can be obtained.
Notes	This KPI is one of three KPIs related to Port State Control Inspections. The three areas covered are; 'Flawless port state control performance' which measures the percentage of Port State Control Inspections resulting in zero deficiencies, 'Port State Control Deficiency Ratio', which measures the ratio of the total number of issued deficiencies during Port State Control Inspections relative to the total number of Port State Control Inspections conducted and this specific, 'Port state control detention' which measures the total number of port state control inspections resulting in a detention.
Unit	Detentions
Scope	Ship level
Calculation period	Quarterly

Formula

[formula]KPI027 = \begin{cases} PI050,& \text{if } PI049\gt 0 \\ Undef,& \text{otherwise} \end{cases}[/formula]

PI049	Number of PSC inspections
PI050	Number of PSC detentions

Ranking calculation example

Step 1: Calculate KPI value

PI049	Number of PSC inspections	= 2
PI050	Number of PSC detentions	= 1
[formula] KPI027_{Value} [/formula]	[formula] = \begin{cases} PI050,& \text{if } PI049\gt 0 \\ Undef,& \text{otherwise} \end{cases} [/formula]	[formula] = \begin{cases} 1,& \text{if } 2\gt 0 \\ Undef,& \text{otherwise} \end{cases} [/formula]	[formula] = 1 [/formula]

Step 2: Calculate percentile rank by comparing KPI value against other ships with the same criteria. We assume that another 99 (100 in total) participate in the ranking with the same criteria and our ship has position 23 and you are the only ship in that rank.

Step 3: Calculate the percentile rank by capturing the count of all participant below your rank (cl). The frequency of ships in your same rank (fi). The total number of ships in the ranking segment (N).

[formula] KPI027_{Percentile Ranking} = \frac{cl+05*fi}{N} * 100 = \frac{77+0.5*1}{100} * 100 = 77.50 [/formula]

Interpretation: Based on the above example, we could say that, when it comes to KPI027 Port state control detention, this ship belongs in the 77.50th percentile of the ships that are being compared with based on its ranking criteria in the respective quarter.