ISO week date - Hackdot

Re:ISO week date by bshipp on Thursday December 26, 2019 @10:26AM (#21884375)

It seems like some people don't understand the use case for week numbers, at least for businesses. They allow the ability for time series comparisons for a work week. Using the calendar date is hopeless because the 21st day of a month could fall on any day of the week.

I want to compare the Monday of the first work week of the year to the Monday of the first work week of last year. That's most helpful when trying to understand sales trends, etc.

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Re:ISO week date by spectramax on Thursday December 26, 2019 @12:44PM (#21885404)

Yep, huge companies like Intel use work-weeks for everything. For e.g. planning huge engineering projects was easy:

  - WW02-WW16: Conceptual Development
  - WW17: CDR
  - WW18-46: Detail Design
  - WW46-48: DDR
  - WW48-52: Validation/Testing
  - WW01-02: Ship to customer

So you could just now know how many weeks it took exactly for each phase:

  - [14] WW02-WW16: Conceptual Development
  - [1] WW17: CDR
  - [28] WW18-46: Detail Design
  - [2] WW46-48: DDR
  - [4] WW48-52: Validation/Testing
  - [2] WW01-02: Ship to customer

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Re:ISO week date by yitchelle on Thursday December 26, 2019 @06:06PM (#21887641)

The ISO weeks are also big in automotive, especially on projects that span over a number of years. It automatically aligned most activities to have a duration measured in whole weeks. Sure, you can use fractional weeks, but then it gets really messy really quick.

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Re:ISO week date by inetknght on Thursday December 26, 2019 @01:58PM (#21885853)

I appreciate the usefulness of using weeks to measure time. But on a side note: less than 10% of time assigned for validation/testing and at the very end of a project is, in my experience, extremely ambitious.

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Re:ISO week date by spectramax on Thursday December 26, 2019 @03:17PM (#21886383)

Lol, please ignore the details, I just quickly wrote it down without thinking to just make a point :) But I agree, its a ridiculous timeline!

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Re:ISO week date by aex on Thursday December 26, 2019 @11:35AM (#21884919)

I don't think the following first weeks are comparable by many work metrics:

* 30 December 2019 - 5 January 2020 (2020 W01)

* 4 January 2021 - 10 January 2021 (2021 W01)

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Re:ISO week date by bshipp on Thursday December 26, 2019 @03:59PM (#21886722)

I don't disagree with you. Some of the decisions that went into the ISO standard are real headscratchers for those of us who have been using North American week numbers

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