April 4, 2010
My boss asked me to perform a quick analysis for his
meeting in 1 hour
Copy pasted data from different spreadsheets to get
job done on time. Paster incorrect data, from miss-
matching dates. Performed back of the envelope
check but, no time to run extensive checks.
Performing analysis on data with many degrees of
freedom requiring pivot table analysis.
Want to arrange analysis columns differently from pivot
table’s alphabetically ordered columns. Updated column
names, applied formula to the ﬁrst column, and dragged
formula to all other cells. Formulae now incorrect for
Working on a complex model with a team of people over
Each person developing different parts of the model. The
assumptions made by different people are different and
there is not enough documentation. When all parts are
put together the ﬁnal model produces incorrect results.
Documentation and planning error
Working on a accounting analysis consulting
project, with unfamiliar data. Developed model
without speaking with all groups involved.
Missed some variables that the model results
Data omission error
Experienced analyst developing a routine model
at the end of the day.
Misses data and doesn’t perform sanity check
because this is a routine task for him.