What indices of indoor air pollution can - and can't - do

This paper is a commentary on comments made by Drs Molhave and Wolkoff regarding indoor air pollution indices presented by the authors in 2003. They make it clear that IAPI attains the following aims : it is easily understood by all stakeholders, it associates well with symptoms, and provides a setting for management of the indoor environment.
Bu this index is a metric of in-office pollution and not a metric of a specific pollutant.
And it can not associate with a specific symptom. This index is offered as a pratical tool in addition to and not in exclusion of fondamental research.