OPeNDAP BOM Tutorial Use Cases October 15/17, 2007

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Presentation transcript:

OPeNDAP BOM Tutorial Use Cases October 15/17, 2007 pfox@opendap.org BOM, Melbourne, VIC 20071017 (Fox)

OPeNDAP needs use cases is a collection of possible sequences of interactions between the system under discussion and its Users (or Actors), relating to a particular goal. The collection of Use Cases should define all system behavior relevant to the actors to assure them that their goals will be carried out properly. Any system behavior that is irrelevant to the actors should not be included in the use cases. BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case is a prose description of a system's behavior when interacting with the outside world. is a technique for capturing functional requirements of business systems and, potentially, of an IT system to support the business system. BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Must be documented (or it is useless) Should be implemented (or it is not well scoped) Identify: objects ~ resources, processes, roles (aka actors), requirements, etc. Iterate with experts at least once BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Examples: Make a collection of netCDF model run datasets available for internet access with web browsing to find suitable data and access to the data via Matlab. BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Examples: Provide browse and quick look access to a broad variety of climate, weather and ocean data. BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Examples: Install an OPeNDAP Hyrax server with THREEDS cataloging on the front-end to support netCDF and HDF4 data sets on the back-end and allow aggregation based on NcML and authentication of user access BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Examples: Provide high-performance data transfer of specific climate model data products into the CDAT tool for analysis independent of their storage format, organization or location on the internet BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Use Case Examples: A US 9th grade teacher is preparing a lesson plan aimed at getting students to learn more about the ‘northern lights’, addressing NSES content standards in earth science. The teacher wants the students to learn the scientific terminology, where the phenomena occurs and retrieve some data or graphics for a recent occurrence. The goal of the lesson plan is the engage students, using authentic data from the aurora, as part of an inquiry-based program. BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) SWAT Roles and skill-sets needed Facilitator *** (usual key skills, knows method) Domain experts (literate, knows resources) Modelers (to extract objects) Software engineers (architecture, technology) Scribe (to write everything down) The social aspect BOM, Melbourne, VIC 20071017 (Fox)

BOM, Melbourne, VIC 20071017 (Fox) Resources http://alistair.cockburn.us/index.php/Use_cases,_ten_years_later http://members.aol.com/acockburn/papers/AltIntro.htm http://alistair.cockburn.us/index.php/Resources_for_writing_use_cases http://alistair.cockburn.us/images/Usecasesintheoryandpractice180.ppt http://alistair.cockburn.us/images/Agileusecases1dy.ppt http://alistair.cockburn.us/index.php/Structuring_use_cases_with_goals http://www.foruse.com/publications/bibliographies/usecases.htm http://en.wikipedia.org/wiki/Use_case http://www.ddj.com/dept/architect/184414701 Omnigraffle (Mac) or Cmap ESIP wiki template BOM, Melbourne, VIC 20071017 (Fox)

When someone asks: “What is your use case”? Treat it like your ‘elevator pitch’ Know them, especially the ones you have implemented Tell them how you used it to develop a solution FOR use BOM, Melbourne, VIC 20071017 (Fox)