# Index Target Effort-Based

`ITe5.Rd`

An index target MP where the Effort is modified according to current index levels (mean index over last 5 years) relative to a target level.

## Usage

```
ITe5(x, Data, reps = 100, plot = FALSE, yrsmth = 5, mc = 0.05)
ITe10(x, Data, reps = 100, plot = FALSE, yrsmth = 5, mc = 0.1)
```

## Arguments

- x
A position in the data object

- Data
A data object

- reps
The number of stochastic samples of the MP recommendation(s)

- plot
Logical. Show the plot?

- yrsmth
The number of historical years over which to average the index

- mc
The maximum fractional change in the effort among years.

## Value

An object of class `Rec-class`

with the TAE slot(s) populated

## Details

The TAE is calculated as:
$$\textrm{TAE}_y = \textrm{TAE}_{y-1} \delta$$
where \(\delta\) is \(\frac{I} {I_{\textrm{ref}}}\) averaged over last
`yrsmth`

years. \(I_{\textrm{ref}}\) is the index target (`Data@Iref`

).

The maximum fractional change in TAE is specified in `mc`

.

## Functions

`ITe5`

: Maximum annual changes are 5 per cent.`ITe10`

: Maximum annual changes are 10 per cent.

## Required Data

See `Data-class`

for information on the `Data`

object

`ITe5`

: Ind, Iref, MPeff

`ITe10`

: Ind, Iref, MPeff

## Rendered Equations

See Online Documentation for correctly rendered equations

## Examples

```
ITe5(1, MSEtool::SimulatedData, plot=TRUE)
#> Effort
#> 1.027335
ITe10(1, MSEtool::SimulatedData, plot=TRUE)
#> Effort
#> 1.117852
```