Written by: Michael Mullan

Dr Michael Mullan has been retired for several years but still continues to provide consultancy services on a pro bono basis if you have an interesting problem or project. 

The website must cover its costs and if you wish help after making a donation for spreadsheets or Ebooks it would be appreciated if you would consider making a donation to cover website running costs before asking for advice.

You can use the PayPal donate button below to make a donation.