Talk:Service level/Archives/2012

Obscure Types?
Where does the typology (type 1, type 2, etc.) and alpha, beta, gamma notation come from? The article pretty much states these as a given, and it makes sense (and is apparently well-developed), but the article provides no hint about where this development originated, and the appropriate domain of discourse. Are they logistics terms, queueing theory, or something else? 70.247.174.19 (talk) 03:38, 18 October 2010 (UTC)

Agreed, AFAIK the type 1, 2, etc is a fairly obscure typology (never heard of them in any supply chain book before reading the wikipedia page). This typology reminds me of the statistical tests terminology. They do make sense though, but in logistics, it's far from being any kind of well-spread typology / terminology. --Joannes Vermorel (talk) 10:54, 6 January 2012 (UTC)

Missing reference
I believe the most important piece of literature in this area is the book of Silver, Pyke, and Peterson (1998). Just have a look at the number of citations to this book if you disagree. The service level measures are well described in this book and I believe these should be added here. Do you agree? — Preceding unsigned comment added by Chilio1st (talk • contribs) 20:03, 24 February 2011 (UTC)

Well, Silver, Pyke, and Peterson (1998) does indeed introduce those 3 service levels - however under a different terminology - namely cycle service level, fill rate and ready rate (and a 4th is introduced too _mean time between stock-outs_). However, the whole discussion takes half a page in a book of 750+ pages ... and it's far from being the most important thing said about service level. The current wikipedia content is already more detailed than the source. We should maybe start with the basics. Btw, I agree that Well, Silver, Pyke, and Peterson (1998) is a absolute reference on the subject. --Joannes Vermorel (talk) 11:59, 27 February 2012 (UTC)

Service level optimization formula
I have published a formula service level gives the "optimal" service level for inventory (the optimality does not come without a couple of assumptions) at http://www.lokad.com/service-level-definition-and-formula.ashx It might be of interest as a reference here. Disclaimer: it's neither academic nor peer-reviewed work. --Joannes Vermorel (talk) 11:15, 6 January 2012 (UTC)