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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$functional requirement% describes some qualit# characteristic that the software must posses *. E,pl E,plai ain n in #our #our own own word wordss what what -spe -speci cifi fica cati tion on as cont contra ract ctm mea eans ns and and what what its its implications are. ["] /. 0or what t#pe of s#stems are formal methods most often used and wh#? [2] . ow do pre$ 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.