Projects inherently involve a lot of communication from a lot of people with a lot of different backgrounds. This type of environment provides a breeding ground for fallacies which results in poor decisions that ultimately hurt the success of the project. Below is a list of ten common fallacies you will see in projects. The list is a subset of what I found in Wikipedia with my thoughts added at the end each definition.
- Ad hominem (attacking the arguer instead of the argument) – This is usually done through name calling or labeling the person something deemed negative. This usually happens when a person runs out of reasons to support their argument so have to resort to attacking your character. It is important to understand when this is happening as it can negatively influence decisions. It also speaks to a greater problem of respect in the project team.
- Cherry picking (suppressed evidence, incomplete evidence) – act of pointing at individual cases or data that seem to confirm a particular position, while ignoring a significant portion of related cases or data that may contradict that position. This problem is more apparent when you have a strong personality doing the cherry picking as others will not speak up to point out suppressed evidence. When you do not feel good about an argument, it is sometimes a good idea to talk individually to each person to hear all the facts.
- Hasty generalization (fallacy of insufficient sample, leaping to a conclusion, secundum quid) – basing a broad conclusion on a small sample. This hurts when people are too quick to fix something before they understand the real problem or if a problem really exists. A good project change and escalation control structure can reduce this fallacy.
- Argumentum ad baculum (appeal to the stick, appeal to force, appeal to threat) – an argument made through coercion or threats of force to support position. This is something I see between business and their IT or business and a vendor. This can work for short term issues, but it hurts the long term relationship which can bring much more to the table.
- Argumentum ad populum (appeal to belief, appeal to the majority) – where a proposition is claimed to be true or good solely because many people believe it to be so. This is something I use to start the conversion on an issue. You first want to ask what everyone else does. In saying that, you should never base the final decision on this alone. It should be based on the facts on why the proposition is true as there are cases where it will make more sense for you to go with a different direction. Continue reading
As a project manager your primary job is communication. Beyond the status meetings and project plan you will be giving and receiving information in a variety ways. Also, you are dealing with people who will be busy on multiple projects and support related problems. Here are some tips which take a small amount of effort for a lot of pay back.



