Requirements Engineering/het werk/werkstuk/2008-9/Groep 05 3J/Usecases

Use cases

Use case 'Add user' Use case name: Add user Iteration Focused Summary Actor creates new user Triggers Actor needs to a new user Assumptions N/A Preconditions User is authenticated as Administrator, Teacher or Scientist Basic course of events Actor decides to create new user Actor enters name Actor selects user type to student, teacher, scientist or administrator Actor sets user group Actor sets user budget Actor submits System confirms Alternative path 1 Actor decides to create several user accounts from a list System asks for input of list Actor gives list as input Actor sets default user type to student, teacher, scientist or administrator Actor sets default group Actor sets default budget Actor submits System confirms addition of users Alternative path 2 (to basic) System rejects user, user name already exists. Actors enters (new) user name Actor submits, proceed to step 6 Alternative path 3 (to alt1) System rejects one or more users, user names already exist (and informs actor of these names) Actors corrects user list Actor submits, proceed to step 8. Exception paths (Extension points) N/A Postconditions One or more Users are added to the system Related business rules Budget is only applicable to users of type student Users of certain type can only be in groups with users of that type Teachers can only add users of types Student Scientists can only add users of type Scientist Administrators can add users of all types Author Joost, Joost en Jan Date 20 nov 2008 14:08 (CET)

Use Case 'Modify user' Use case name: Modify User Iteration Focused Summary Actor modifies or deletes an existing user Triggers Actor needs to modify users Assumptions N/A Preconditions User is authenticated as Administrator, Teacher or Scientist Basic course of events Actor decides to modify user Actors selects user to be edited Actor updates user details (name, type, group and/or budget) Actor indicates whether or not to delete user Actor submits System confirms Alternative path 1 Actor decides to modify one or more users Actor selects user(s) or a group Actor updates users details (type, group and/or budget) Actor indicates whether or not to delete users Actor submits System confirms Alternative path 2 (to basic and alt 1) System rejects, actor tries to delete his own account, proceed to step 2 (Extension points) N/a Postconditions User information is up-to-date Related business rules Budget is only applicable to users of type student Teachers can only delete users of type Student Teachers can modify users of type Student Scientists can modify users of type Scientists Administrators can delete and modify any type of user Author Joost, Joost en Jan Date 20 nov 2008 14:45 (CET)

Use case 'Add group' Use case name: Add group Iteration Focused Summary Actor adds new group Triggers Actor decides that he wants to create a new group Assumptions N/A Preconditions User is authenticated as Administrator or Teacher Basic course of events Actor indicates they would like to create a new group Actor enters name Actor sets group's parameters System confirms Alternative path 1 (to basic) After group creation system asks if users should be added immediately Actor confirms and selects user that are to be added to that group Alternative path 2 (to basic) System rejects, group already exists. Actor enters a new name, proceed to step 6 Exception paths (Extension points) N/A Postconditions A new group has been added to the system Related business rules User can be member of one group maximum Author JJJ Date 2 dec 2008 19:43 (CET)

Use case 'Modify group' Use case name: Modify group Iteration Focused Summary Actor modifies or deletes a group Triggers Actor indicates they would like to modify a group Assumptions N/A Preconditions Actor is authenticated as Administrator or Teacher Basic course of events Actor decides to modify a group System asks for group Actor selects group System displays group's parameters Actor sets group's parameters System confirms Alternative path 1 (to basic) Actor decides to delete one or more groups System asks to select the to-be-deleted group(s) Actor selects group(s) System confirms input and asks confirmation of deletion Actor confirms Alternative path 2 (to basic) System rejects; parameters out of bounds/inappropriate Actor sets new group parameters, continue with step 6 Alternative path 3 (to alt 1) System rejects; current user is in one of the selected groups Proceed with step 2 Exception paths (Extension points) N/A Postconditions Group modified/deleted Related business rules N/A Author JJJ Date 2 dec 2008 20:01 (CET)

Use case 'Add molecule' Use case name: Add molecule Iteration Focused Summary Actor adds molecule to the system Triggers Actor needs a new molecule Assumptions N/A Preconditions Actor is authenticated as Administrator, Teacher or Scientist Basic course of events Actor decides to create a new molecule Actor enters molecule name Actor defines a molecule by setting several parameters 1 System confirms Alternative path 1 (to basic) System rejects; molecule name or parameters already in use or out of bounds/inappropriate Continue with step 2 Exception paths (Extension points) N/A Postconditions New molecule added to system Related business rules N/A Remarks 1 The exact details of the parameters are not known to us. There should be something on the RE site, but we could not find it. It could have been the re-casus.pdf document on the sheets page but unfortunately this file does not exist any more. We do think, apart from not having the specifics, this is a good way to model a molecule because it's very flexible. A set of settings can be defined and changed if, for example, a new simulator (or new version) is used. Author Jan en Joosten Date 20 nov 2008 15:23 (CET)

Use case 'Modify molecule' Use case name: Modify molecule Iteration Focused Summary Actor deletes or modifies molecule Triggers Actor needs to delete or modify molecule Assumptions N/A Preconditions Actor is authenticated as Administrator, Teacher or Scientist Molecule to be modified is known by the system Basic course of events Actor decides to delete one or more molecules System asks which molecules are to be deleted Actor selects molecule(s) Actor confirms deletion Systems confirms deletion Alternative path 1 (to basic) Actor decides to change existing molecule Systems asks for molecule to change Actor selects molecule Systems displays properties of molecule Actor changes properties and saves changes System confirms change Alternative path 2 (to basic) Actor wants to delete a molecule currently used by a sample Systems notifies users and skips deletion of this (these) particular molecule(s) Exception paths (Extension points) N/A Postconditions Existing molecule has been modified Related business rules N/A Author Joost, Jan en Joost Date 2 dec 2008 20:52 (CET)

Use case 'Add sample' Use case name: Add sample Iteration Focused Summary Actor adds sample to system Triggers Actor decides to create a new sample Assumptions N/A Preconditions Actor is authenticated as Administrator, Teacher or Scientist Basic course of events Actor decides to create a new sample Actor enters sample name Actor sets molecules the sample consists of, at least one can be used as a solvent System confirms Alternative path 1 (to basic) System rejects; sample name already in use Actor sets new sample name, proceed to step 5 Exception paths N/A (Extension points) N/A Postconditions New sample added Related business rules N/A Author JJJ Date 2 dec 2008 21:01 (CET)

Use case 'Modify sample' Use case name: Modify sample Iteration Focused Summary Actor modifies or deletes an existing sample Triggers Actor indicates that he wants to delete one or more samples Assumptions N/A Preconditions Actor is authenticated as Administrator, Teacher or Scientist Basic course of events Actor decides to change existing sample System asks for sample Actor selects sample Systems displays properties of sample Actor changes properties and saves changes System confirms change Alternative path 1 (to basic) Actor decides to delete one or more samples System asks which samples are to be deleted Actor selects sample(s) Systems asks for confirmation Actor confirms Systems confirms deletion Alternative path 2 (to alt basic) System rejects, one or more selected molecules are currently in use Proceed to step 3 Exception paths N/A (Extension points) Postconditions An existing sample has been modified Related business rules N/A Author JJJ Date 2 dec 2008 21:10 (CET)

Use case 'Conduct Experiment' Use case name: Conduct Experiment Iteration Focused Summary Actor conducts an experiment an a sample. This entails choosing the NMR-parameters for the FID, awaiting the results and using them as input for the Fourier analysis Triggers Actor needs to conduct experiment Assumptions N/A Preconditions Actor is authenticated as either student, teacher, scientist or administrator Basic course of events Actor decides to conduct an experiment Actor selects sample (eligibility depends on business rules 17 and 18) Actor sets NMR-Parameters System shows experiment costs and duration based on settings User continues experiment with settings Systems renders a HNMR signal (FID) Actor converts resulting signal in Fourier analysis System displays graph of Fourier analysis. Alternative path 1 (to basic) Actor is not satisfied with experiments cost or duration in step set in step 3 and alters the settings made in step 3 Proceed to step 6 Alternative path 2 (to basic) System rejects due to dumb settings chosen in 3 and displays this User changes settings in step3 and continues Exception paths (Extension points) N/A Postconditions Actor retrieved a Fourier analysis for the experiment he conducted Remarks 1 an assignment from user to sample is created automaticly Related business rules N/A Author JJ Date 4 jan 2009 22:37 (CET)

Use case '(de)Assign Experiment' Use case name: (De-) Assign Experiment Iteration Focused Summary Actor assigns samples to be distributed to the users in a group Triggers Actor needs to assign samples to students Assumptions N/A Preconditions Actor is authenticated as either teacher, scientist or administrator Basic course of events Actor assign samples to a group Actor selects group Actor selects samples to be distributed Actor selects fake name for this series of experiments System confirms Alternative Path 1 Actor removes experiments from a group Actor selects group Actor selects experiments to be removed System confirms Exception paths N/A (Extension points) N/A Postconditions All samples selected in step 3 are distributed over members to the group, repeating samples if there are more samples then group members. All experiments have the same fake-name appended with an incremental number. On deletion, all users from the selected group, will no longer be assigned to any of the selected experiments. Related business rules N/A Author JJ Date 4 jan 2009 22:37 (CET)