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Meeting 13

February 28, 2007

Software Development

• Preparing for team project

• Use agile development process

Agile Development Process

The players are

• Product owner: sets priorities, owns in the sense of is responsible for

• Scrum master: manages development process, removes blocks to success

• Team members: develop product

• Stakeholders: observe, advise. Includes the customer

Agile Process (2)

The process• Based on cycles, called sprints, usually 30

calendar days long• Starts with the backlog

– Maintained by the product owner– Lists all that needs to be done to complete the project,

divided into short deadline actions

• Sprint plan designates how much time will be spent on which items in the backlog during the next 30 days.

Agile Process (3)

• Daily scrum– Short (10-15 minutes), stand-up meeting of

team– Each person reports

• Accomplished yesterday• Plans to accomplish today• Blocks from yesterday

Agile Process (4)

• Sprint review– Monthly meeting of

• Team members• Stakeholders• Product owner

– Led by scrum master– Report on project status

Agile Process (5)

• Release– Usually every three months– Newest version of software– Evolved from previous release based on

stakeholder feedback

• Key observation– Monthly sprints allow software requirements

to evolve as stakeholders see the results of the development process.

Our Agile Process

• 3 member teams

• 7 day sprints

• 14 day releases

• 15 WAGs per sprint—a WAG is measured in person hours

Our Agile Process (2)

• Sprint planning / sprint review for our 6 sprints– March 12– March 19– March 26– April 2– April 16– April 23

Our Agile Process (3)

• Releases on– March 26– April 16– May 2

Our Agile Process (4)

• Sprint plans due 5 p.m. on each planning day

• List activity / team member / WAG– For example:

• Code and test interpolation function / John / 3• Generate use cases / Mary / 2• …

• WAG total must be 15, relatively evenly divided across team

Our Agile Process (6)

• Sprint reviews– Short team presentation– 2 or 3 slides– Encourage stakeholder interaction

• Releases– Working code– Installable and testable against release cases

and their equivalents

Our Agile Process (7)

• Product owner: chosen by team

• Scrum master: same as product owner since our teams are small

• Team members: see next slide

• Stakeholders: instructor, as customer, and others he may designate

Our Development Teams

• Team Aspen: Alex, Jason, Rob

• Team Bailey: Justin, Jenny, Sean

• Team Cedar: Dublas, Nick, Mike

The Problem

Initial statement:

Given a positive integer n, find the maximum radius r for n equally sized spheres that are contained in the unit sphere.

Problem Observations

• If n = 1, then r = 1 and the “small” sphere is the same as the “big” sphere.

• If n = 2, then r = ½. The centers of the small spheres are at (1/2, 0, 0) and (-1/2, 0, 0)

• If n = 3, then the centers of the small spheres lie at the vertices of an equilateral triangle.