PowerShell: A Simple Batch Processing System

This is the skeleton of a Batch Processing System (Importing from a CSV file, performing consecutive tasks that are dependant on the previous task completing and then outputting the result).

I detailed how it works in Part 1 here and in Part 2 here.

[CmdletBinding()]
Param
(
    [parameter(Mandatory=$True)]
    [string]$BatchFile     
)
function New-ReportObject
{
    Param
    (
        [Parameter(ValueFromPipeline=$true)]
        [PSObject]$TargetObject=$Null     
    )
    BEGIN
    {
    }
    PROCESS
    {
        $ReportObject=New-Object -typename PSObject 
        $ReportObject | Add-Member -MemberType NoteProperty -Name "Identifier" -Value ""
        $ReportObject | Add-Member -MemberType NoteProperty -Name "Task1Complete" -Value $False
        $ReportObject | Add-Member -MemberType NoteProperty -Name "Task2Complete" -Value $False
        $ReportObject | Add-Member -MemberType NoteProperty -Name "Note" -Value ""     
        if(!($TargetObject -eq $Null))
        {    
            $ReportObject.Identifier = $TargetObject.DistinguishedName
        }
        Return $ReportObject
    }
    END
    {
    }
}

function Set-Task1
{
    Param
    (
        [Parameter(ValueFromPipeline=$true)]
        [PSObject]$TargetObject=$Null   
    )   
    BEGIN
    {
    }
    PROCESS
    { 
        if($TargetObject -eq $Null)
        {    
            Return $Null
        }
        try
        {
            Set-Mailbox -Identity $TargetObject.Identifier -CustomAttribute6 "Value1" -ErrorAction Stop
            $TargetObject.Task1Complete=$True
        }
        catch
        {
            if ($Error.Count -gt 0)
            {
                $TargetObject.Note=$Error[0]
            }
            $Error.Clear()
        }
        Return $TargetObject
    }
    END
    {
    }
}

function Set-Task2
{
    Param
    (
        [Parameter(ValueFromPipeline=$true)]
        [PSObject]$TargetObject=$Null 
    )   
    BEGIN
    {
    }
    PROCESS
    { 
        if($TargetObject -eq $Null)
        {    
            Return $Null
        }
        try
        {
            Set-Mailbox -Identity $TargetObject.Identifier -CustomAttribute5 "Value2" -ErrorAction Stop
            $TargetObject.Task2Complete=$True
        }
        catch
        {
            if ($Error.Count -gt 0)
            {
                $TargetObject.Note=$Error[0]
            }
            $Error.Clear()
        }
        Return $TargetObject
    }
    END
    {
    }
}

$ObjectsToProcess=Import-CSV -Path $BatchFile | Select-Object -ExpandProperty EmailAddress | % {Get-Mailbox $_} | New-ReportObject
$ObjectsToProcess |  Set-Task1 | Where-Object {$_.Task1Complete} | Set-Task2