Stacey Dooley visits practices around the UK to see how vets Cat, James, Rory and Cheryl care for our furry friends.
Runtime: 20 minutes
The Pets Factor - Bus factor - Netflix
The bus factor is a measurement of the risk resulting from information and capabilities not being shared among team members, from the phrase “in case they get hit by a bus”. It is also known as the lottery factor, truck factor, bus/truck number, or lorry factor. The concept is similar to the much older idea of key person risk, but considers the consequences of losing key technical experts, versus financial or managerial executives (who are theoretically replaceable at an insurable cost). Personnel must be both key and irreplaceable to contribute to the bus factor; losing a replaceable or non-key person would not result in a bus-factor effect. The term was first applied to software development, where a team member might create critical components by crafting code that performs well, but which also is unavailable to other team members, such as work that was undocumented, never shared, encrypted, obfuscated, unpublished, or otherwise incomprehensible to others. Thus a key component would be effectively lost as a direct consequence of the absence of that team member, making the member key. If this component was key to the project's advancement, the project would stall.
The Pets Factor - Definition - Netflix
The “bus factor” is the minimum number of team members that have to suddenly disappear from a project before the project stalls due to lack of knowledgeable or competent personnel. The expression “hit by a bus” describes a person either dying or more generally disappearing suddenly from the project. It is used to describe hypothetical future disappearances in a darkly humorous way. Team members do not literally have to get “hit by a bus” for the “bus factor” to apply—any number of events could occur in which a team member could be suddenly and substantially prevented from working on the project. This could include a person taking a new job, going on parental leave, or changing lifestyle or life status. For instance, say a team of 30 people produces bread in three necessary steps: mixing ingredients, kneading the dough, and baking. Ten people know how to mix ingredients, all 30 people know how to knead the dough, and 5 people know how to bake. If all 5 people who know how to bake disappear, then the team cannot produce bread, so the team's bus factor is 5. A rare alternative definition for the bus factor defines the bus factor as the number of people who are indispensable for the project. In other words, it is the number of people who are a single point of failure. If using this definition, then a high bus factor is considered a bad thing (since the loss of any person included destroys the project), and zero is considered the ideal bus factor.
The Pets Factor - References - Netflix