pygrunn 2012 architectural decisions

Architectural Decisions- a Django Tool -

Dan Tofan, PhD studentSpyros Ioakeimidis, MSc student

Grayson Kleine, MSc studentJos van der Til, MSc student

Architectural Decisions

› Hard, expensive

› Examples: • programming language• architectural pattern

Decisions

AD

Losing Knowledge on Decisions

› Fast changing environment› Unawareness› Low “bus factor”› Postponing› Forgetting› Efforts > benefits

Good architects make good decisions

How do we improve

architectural decision making?

Understand decision making

Just F* Do It!

Hold Your Horses!

Repertory Grid Technique

Grid-based rating technique

Structured interview

+

Source: http://www.slideshare.net/bthomas/rep-grid-the-missing-ux-technique

Source: http://www.slideshare.net/bthomas/rep-grid-the-missing-ux-technique

RGT for Architectural Decisions

1. Choose Decision Topic

2. Produce alternatives

3. Produce characteristics

4. Rate alternatives

Decision making

Individual Group

Individual Decisions

1. Agree on decision topic

2. Generate alternatives

•Facilitator questions:•Is

there any alternative that is missing?

•Output: list of alternatives

3. Generate concerns

•Capture concerns directly or through triadic elicitation from RGT

•Output: individual lists of concerns

4. Consolidate concerns

•Do these concerns uncover other possible alternatives?

•Output: common list of concerns

5. Weight concerns

•Prioritize concerns

•Output: individual lists of concerns’ weights

Group Decisions

1. Individual Grid Rating

2. Individual Concerns Weights

Adjusting

3. Identify Divergences from Metrics

4. Group Discussion on Divergences

Tool demo

Sources:› http://www.crm.com/crm.com/CRM.COMSoftware/technology_content/logical.jsp› http://twoweeksonatrolley.blogspot.com/2010/10/why.html› http://www.mrtc.mdh.se/events/files/ID1422.pdf› http://illinoisdeservesthetruth.typepad.com/.a/6a00e54f08fd1088340120a6abf3919

70c-250wi› http://www.slideshare.net/dansaffer/making-good-design-decisions› http://www.cartoonstock.com/lowres/wpa0260l.jpg› http://chzmemebase.files.wordpress.com/2011/03/memes-hold-your-horses.jpg› http://www.lovefraud.com/blog/wp-content/uploads/Yoda-light-sabre-210x300.jpg› http://freeimagesarchive.com/data/media/213/Stewie+Griffin+Family+Guy.jpg› http://www.slideshare.net/bthomas/rep-grid-the-missing-ux-technique