Re: Week code and serial numbers
- Hello Again Folks,
Not a very good start , geting the ISO number wrong. I am of
course referring to ISO 8601.
--- In ISO8601@y..., monahan.p@e... wrote:
> Hello Folks,
> I am trying to get my company to convert to ISO 1806 for the
> assignment of the week code used in our serial numbers.
> I need clear rules that state when the year code and week
> used in a serial number should change at the start of a new
> For the purpose of this discussion , I will use a serial number
> format that includes the following year and week code fields ;
> Where ,
> YY ---> Year code , example year 2001 is ......
> WW ---> Calendar week numer as per ISO 1806
> SSSSS --> Counter code , resets to 00001 at the start
> a new week
> As I understand it , ISO 1806 defines Monday as the first day of
> the week. It also defines week code " 01 " as the week that
> the first Thursday of that year.
> In the case of a year where January the first is a Sunday , for
> example 2006 , a serial number assigned to a product built on
> Sunday 20060101 [ 1-JAN-2006 ] would have the following
> code and week code data ;
> Year code -----> 05
> Week code ---> 52
> The logic that I use is that the week code only changes at the
> start of a new week. Sunday is not the start of a new week. The
> year code is only checked at the start of a new week.
> A serial number assigned to a product built on Monday
> 20060102 [ 2-JAN-2006 ] would have the following year code
> and week code data ;
> Year code -----> 06
> Week code ---> 01
> An example that features a week code 53 is Saturday
> [ 1-JAN-2005 ]. Serial number assigned to a product built on
> Saturday 20050101 [ 1-JAN-2005 ] and Sunday 20050102 [ 2-
> JAN-2005 ] would have the following year code and week code
> data ;
> Year code ------> 04
> Week code -----> 53
> Serial number assigned to a product built on Monday
> [ 3-JAN-2005 ] would have the following year code and week
> code data ;
> Year code ------> 05
> Week code -----> 01
> Is the above logic correct ? Does ISO 1806 address the use of
> week code in serial numbers ?