Requirements Engineering Questions and Answers

1. What What is Requir Requireme ements nts Engin Engineer eering ing?? [2] Requirements engineering is a subset of software engineering that deals with the use of  sound techniques for the development and management of software requirements. 2. What What is a proce process ss in Engi Enginee neerin ring? g? [2] n engineering engineering a process process is a set of interrelated interrelated tas!s that together transform inputs inputs into outputs. ". Wh# do we need well$defin well$defined ed processes processes in Engineering Engineering?? [2] Engineers have well$defined processes% &nderstand the requirements 'which is a crucial step toward building reliable and usable software s#stems.() prepare 'to save time and mone# later in the software development and maintenance activities.() construct) test and these processes are tried and tested and are repeatable therefore performance improves and production of a good qualit# product. *. Requirement Requirementss capture both function functional al and non$functiona non$functionall requirements. requirements. What What are non$ functional requirements? [1] +ualit# requirement or non$functional requirement% describes some qualit# characteristic that the software must posses *. E,pl E,plai ain n in #our #our own own word wordss what what -spe -speci cifi fica cati tion on as cont contra ract ctm mea eans ns and and what what its its implications are. ["] /. 0or what t#pe of s#stems are formal methods most often used and wh#? [2] . ow do pre$ and postconditions relate to one another? [2] 3. 4ive a brief definition) in #our own words) what formal methods are and what their   purpose is. [2] 5. Write Write the formulae 'propositions( to denote% 'a( 6eter is #our brother [2] 'b( 78"92 is taught b# :i!e [2] 'c( Whenever it is 0rida#  don;t go to classes [2] <. =ata flow diagrams '=0=s( ma# be used to model the s#stem>s data processing. ou have  been contracted to automate an @rder processing s#stem. Ahe following describes the order   processing s#stem. =erive a =0= for the s#stem 'on the part of the compan# suppl#ing the customer onl#(. [19]

@rder processing refers to the wor!flow associated with serving a customer>s order) from the receipt of the order) until the goods have been delivered to the customer and properl# documented. t consists of the following stages% 'i( @rder 6reparation $ =emand for a product becomes a signal for a bu#er to place an order. Ahis requires an order to be sent to that of a regular supplier. 8tandardiBed order forms are used when ordering. Ahis guides the bu#ers in preparing the orders) facilitates ease in  processing and minimiBes errors in entr#. 8ome important inputs on the order form are% 8hip to Cddress) tem Dumber and description) @rder +uantit#) and deliver# date. Ahe order form is filled out) validated and recorded. 'ii( @rder Aransmittal $ @nce the order is finaliBed) the bu#er sends the order to the supplier. @nce received) the seller triggers the process used in serving the order. 'iii( @rder deliver# $ Cfter the items have been prepared b# the supplier) a shipping confirmation is generated to record how man# items were actuall# pic!ed and pac!ed for  shipment based on the order. nformation confirmed at this stage serves as a basis of the details of the shipping documents and the final invoice for the bu#er. 8hipping documentation and the schedule of deliver# is arranged at this point. 'iv( @rder 8tatus Reporting $ t is vital to provide the bu#er with a status of the order once this has been shipped out. Ahis starts with the tracing and trac!ing of the order once released from the warehouse. Ahe nvoice) which contains the order details and the charges) are also released at this stage) and nvoice transmittal to the bu#er is done. 'v( 4ood received and 8ent to 7ustomer  @nce the good are received the invoice is paid and the goods are dispatched to the customer with an invoice. 6a#ment of the invoice b# the customer completes the order process.