Conditionally applying and removing css based on a table row clicked
Should your &lt;tr&gt; elements be using normalAvailability, mcAvailabilty, etc. as ID's or as classes?
It looks like you are passing a &lt;tr&gt; element to handleKPI_Selection() not a &lt;td&gt;, so perhaps the parameter should be renamed.
I don't really see great value in your handleKPI_Selection() function being separated out. If don't see where the first conditional case would ever be triggered based on what you have shown (where index value is always 0).  This calls into question you whole design, which seems to alwasy want to pass in a searchFilter value, but then never use it.
Are you sure toggleClass("kpi-selected") is what you want to do here?  What if user repeatedly clicks the same row?
This following conditional seems unnecessary.


Your code:

    if ($(this).attr('id') === "normalAvailability") {

        handleKPI_Selection($(this), 0, 'Normal');
    }
    else if ($(this).attr('id') === "mcAvailability") {

        handleKPI_Selection($(this), 0, 'Mission Critical');
    }
    else if ($(this).attr('id') === "eeAvailability") {

        handleKPI_Selection($(this), 0, 'Entity Essential');
    }


This can be simplified to something like:

var idToSearchMap = {
   'normalAvailability': 'Normal',
   'mcAvailability': 'Mission Critical',
   'eeAvailability': 'Entity Essential'
}
var search = idToSearchMap[$(this).attr('id')] || '';
handleKPI_Selection($(this), 0, search);


Keep your code DRY.


I would avoid non-standard javascript symbol name syntax in your code (i.e. not camelCase). For example, handleKPI_Selection could perhaps instead be handleKpiSelection.
If you are going to have multiple section-list elements, then the following line of code may be problematic


Your code:

$('.section-list tr').removeClass("kpi-selected");


This will remove class from all rows on all section-lists.  If you only want to target current section list, then you would need to do something like:

$(this).closest('.section-list').find('tr').removeClass('kpi-selected');