Post on 14-Dec-2015
Introduction to Information Systems Project
Debriefing Phase 1
Overview
General Problem analysis Database design Data extraction
Technical SQL & PostgreSQL Regular expressions Java JDBC
Main problems in phase 1
Finding correct mappings Real world Abstract schema Abstract schema Database schema
Use of suitable data types Not everything is a varchar …
Writing documentation Good documentation helps yourself understand
code you wrote 4 weeks ago … … and it helps us understand your work
What was great …
Big effort of many students Large time investment
Interactive Good questions in the forum High participation during project sessions
Some excellent work Well designed databases Great bots
Good understanding of RegExp Remember: Learning RegExp is for life :-)
No server crashes (knock on wood! :-)
… what was not so great …
Too many questions via e-mail. Use the forum instead, so everybody can profit!
Slight asynchrony between course and project (our fault, sorry!)
… and what was bad
Deadlines not respected (by 42%) 42% for phase 1 21% for report URLs
Hand-ins in wrong formats Database dumps in HTML or PDF
People don’t read the web site Wealth of information available Skimming is not enough
Minimalist reports Half a screen page for five weeks Incomplete (missing graphics and explanations)
Phase 1 in Numbers
54 students 19 groups in 6 consortia Some 200 e-mails One group had
147,460 albums with 1,874,842 songs 68 MB database >45 GB traffic in one day (EPFL average is 183 GB/day)
Average grade: 4.4
What will change
Strict deadlines 10% deduction per day (5 minutes late = 0.5
points less) Exponential deduction for repeating offenders
Valid XHTML required 0.5 points deduction if invalid Use XHTML validator at: http://validator.w3.org/
“Checklist” for hand-ins Pure courtesy, don’t expect this in real life …
Tips for the remaining phases Read No, not just skim, read Use the documentation (Postgres, J2EE)
Very useful and important for future projects Indispensable in real life
Don’t be afraid to try new things “Learning by doing” – Writing stuff from scratch instead
of extending sample code takes more time but pays off Use the forum …
… to ask questions, … to learn from other people’s problems
What could change
Your critique? Problems? Feedback?
Now’s the timeAlso by e-mail or in personConstructive feedback is always well
received, positive or negative
Have a good start for phase 2!