DDevelopment & Design

Commitment in ScrumCommitment in Scrum

Short note taken long time ago from Henrik Kniberg’s slides about a few aspects of commitment in Scrum

This is a note to self. Note taken long ago from Scrum beyond trenches slides by Henrik Kniberg. Just for myself not to forget.

The sprint commitment – misconceptions

”We promise to achieve this goal”
“We promise to deliver all stories included in the sprint backlog”

I’ll repeat!. These are misconceptions!

 Team’s commitment to the product owner

We promise that:

“… we believe we can reach the sprint goal.”
“… we will do everything in our power to reach the sprint goal, and will let you know immediately if we no longer believe we can reach it.”
“… we believe that we can complete all stories included in the sprint backlog.”
“… we will demonstrate releasable code at the end of the sprint.”
“… if we fall behind schedule we will talk to you and, if necessary, remove the lowest priority stories first.”
“… if we get ahead of schedule, we will add stories to the sprint from the product backlog, in priority order.”
“… we will display our progress and status on a daily basis.”
“… every story that we do deliver is Done.”

Hmm, the opposite of misconceptions should be conceptions, right :D?

Your experience

Would you add any more to these lists? Do you have any experience being hit by wrongly understood commitment? Share!

Kiedyś programista, obecnie PM i ewangelista metod zwinnych.

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Need to make a quick json fixes – JSONPath for rescue

From time to time I have a need to do some fixes in my json data. In a world of flat files I do this with grep/sed/awk tool chain. How to handle it for JSON? Searching for a solution I came across the JSONPath. It quite mature tool (from 2007) but I haven't hear about it so I decided to share my experience with others.

First of all you can try it without pain online: http://jsonpath.curiousconcept.com/. Full syntax is described at http://goessner.net/articles/JsonPath/



But also you can download python binding and run it from command line:
$ sudo apt-get install python-jsonpath-rw
$ sudo apt-get install python-setuptools
$ sudo easy_install -U jsonpath

After that you can use inside python or with simple cli wrapper:
#!/usr/bin/python
import sys, json, jsonpath

path = sys.argv[1]

result = jsonpath.jsonpath(json.load(sys.stdin), path)
print json.dumps(result, indent=2)

… you can use it in your shell e.g. for json:
{
"store": {
"book": [
      {
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
      },
      {
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
      },
      {
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
      },
      {
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
      }
    ],
"bicycle": {
"color": "red",
"price": 19.95
    }
  }
}

You can print only book nodes with price lower than 10 by:
$ jsonpath '$..book[?(@.price

Result:
[
  {
"category": "reference",
"price": 8.95,
"title": "Sayings of the Century",
"author": "Nigel Rees"
  },
  {
"category": "fiction",
"price": 8.99,
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"author": "Herman Melville"
  }
]

Have a nice JSON hacking!From time to time I have a need to do some fixes in my json data. In a world of flat files I do this with grep/sed/awk tool chain. How to handle it for JSON? Searching for a solution I came across the JSONPath. It quite mature tool (from 2007) but I haven't hear about it so I decided to share my experience with others.