Skip to main content

Home/ BARE+IA Requirements Engineering Information&Business Analysis/ Group items tagged actors

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
Peter Van der Straaten

Introduction to Personas - 0 views

www.agilemodeling.com/...personas.htm

agile requirements engineering business analysis 2011-2015 personas Scott Ambler actors Use case

shared by Peter Van der Straaten on 23 Nov 12 - Cached
  • Unlike actors, personas are not roles which people play
  • Personas are different because they describe an archetypical instance of an actor.  In a use case model we would have a Customer actor, yet with personas we would instead describe several different types of customers to help bring the idea to life.
  • first introduced by Alan Cooper
Peter Van der Straaten

The beginner's guide to BDD (behaviour-driven development) - 0 views

inviqa.com/bdd-guide

BDD requirements requirements analysis TDD EPO agile

shared by Peter Van der Straaten on 20 May 21 - No Cached
  • to support the ability for systems to change, we should be able to safely make big changes (supported by automated scenarios), as well as the small ones (supported by automated object specifications).
  • Impact mapping
  • mind mapping
  • ...19 more annotations...
  • business goal, one or more actors, one or more impacts and one or more ways to support or prevent these impacts
  • You always start with the business goal; it is your map’s root node. You then grow the map out from the goal by first identifying all the actors (e.g. the customer or the team) that could help or prevent the project from achieving the goal. Each actor could have multiple ways to help or hinder achieving the goal, we call these impacts. The last layer of an impact map defines what the project or delivery team can do in order to support or prevent particular impacts from happening, and this is the layer where your software options come into play.
  • In BDD we use Cynefin to identify which features require the most attention
  • Value and complexity analysis
  • reuse
  • outsource
  • Cynefin to make strategic planning decisions based on value/complexity analysis
  • Planning in examples
  • Usage-centered design
  • Ubiquitous language
  • eliminate the cost of translation
  • borrowed from DDD (Domain Driven Design)
  • 'Given, describes the initial context for the example'When' describes the action that the actor in the system or stakeholder performs'Then' describes the expected outcome of that action
  • Introducing the three amigos
  • no single person has the full answer to the problem
  • business person, a developer and a tester.
  • Development through examples
  • The BDD loops
  • How we use it
Peter Van der Straaten

Alistair.Cockburn.us | Use cases, ten years later - 1 views

alistair.cockburn.us/Use+cases,+ten+years+later

requirements engineering use case training cockburn debate

shared by Peter Van der Straaten on 05 Feb 15 - No Cached
  • Is a use case a requirement or just a story? Is a scenario just another name for a use case? Is a use case a formal, semi-formal, or informal structure? Is there a linking structure for use cases, or do they just come in piles?
  • make use cases “rigorous
  • People want a fairly informal medium in which to express their early thoughts
  • ...28 more annotations...
  • handling all the variations a system must handle.
  • Using these semi-formal structures, we can both Assert that use cases really are requirements and need a basic structure, and also Allow people to write whatever they want when they need to.
  • Here is the semi-formal structure
  • Linking use cases to actors’ goals
  • If the software supports those goals, the software will yield the greatest business value.
  • goals sometimes fail
  • failure handling
  • Therefore, a use case is structured into two sections: the sequence of actions when everything goes well, followed by various small sequences describing what happens when the various goals and subgoals fail.
  • Why do we write things in the use case that are not externally visible behaviors?
  • contract between stakeholders
  • there remained a split between those who still wanted to keep use cases short and informal and those who wanted them to be detailed
  • Here are four key pieces of advice that you should note from the evolution of use cases.
  • readable use cases might actually get read
  • Prepare for Multiple Formats
  • Only Use Them When the Form is Appropriate
  • Be Aware of Use Case Limits
  • Use cases should not be used to describe UI designs
  • use case is normally intended as a requirements document, and the UI design is a design
  • The same system feature is likely to show up as a line item in multiple use cases
  • Use cases have a basic mismatch with feature lists
  • Use cases are not test plans or test cases
  • Avoid the Standard Mistakes in Use Cases
  • The two most common and most costly to the project are including too many details and including UI specifics
  • it’s just that by the time I get subgoals at a good level and remove the design specifics, the task is less than nine step
  • The greatest value of the use case does not lie in the main scenario, but in alternative behaviors
  • If the main scenario is between three and nine steps long, the total use case might only be two or three pages long, which is long enough.
  • The Stakeholders and Interests model fills the holes in the Actors and Goals model
  • Originally published in STQE magazine, Mar/Apr 2002
Peter Van der Straaten

Alistair.Cockburn.us | A user story is the title of one scenario whereas a use case is ... - 0 views

alistair.cockburn.us/contents+of+multiple+scenarios

agile use case user story uml cockburn debate

shared by Peter Van der Straaten on 25 May 12 - Cached
  • As a … I want… so that…” is a new-fangled user story format. The original XP user story format had no rules, so you could simply highlight any phrase in a use case and call it a user story. Personally, I feel sorry for anyone who has to write “As a… I want… so that…” for 200 user stories. Kind of like being kept after school and having to write “I will not write silly user stories in class” 100 times
  • A use case pretty much by definition contains multiple stories. A use case is a collection of scenarios related to the primary actor’s goal – some scenarios show the actor interacting with the system and the system interacting with other systems so that they succeed with the goal, some show failure. That’s all in the nature of a use case. see Structuring use cases with goals (discussion: Re: Structuring use cases with goals) from 1995. A use case written for this will occupy between half a page for a shortish one to 2 pages for a long one. A user story is a nickname for a single scenario – it contains neither the information content of the scenario nor failure or alternate paths. A user story typically occupies 1/2 to one sentence no matter its size.
  • (p.s. Agile was supposed to reduce bureaucracy and overhead, not add to it. :) Alistair
1 - 4 of 4
Showing 20▼ items per page