what was your hardest engineering project you have ever done

Question: what was your hardest engineering project you have ever done
- Keywords:
  difficult,
  project
Asked by 499heah35 to David, Bobby, Claire B, Claire C, Veasna on 13 Mar 2017. This question was also asked by 232heah26.
- Claire Conway answered on 13 Mar 2017:
  
  My most difficult project was my first study in my PhD. I found it difficult but it also the study I am most proud of !

Question: what was your hardest engineering project you have ever done