chapter 3 Flashcards
define estimation.
is the process of reliably predicting various parameters of a product
what are the needs for estimation?
- feasibility
- control
- confidence
- trade-off
what are elements of a sound estimate?
WE Like Cooking
- WBS
- effort estimate
- list of assumptions
- consensus among team
mention problems of estimation.
u can cook clean = p right
- uniqueness of software
- constraints
- customer reqs
- change in technology
- productivity
- resource
mention approaches of estimation.
- ad hoc
- analogy
- expert judgment
- empirical model
what are the 2 approaches in expert judgemnet?
- delphi & wideband delphi
_______ is an expert survery in 2 or more rounds?
delphi
delphi approach is aka?
Non consecutive group consensus
in delphi approach experts make estimates how?
anonymously
wideband delohi is aka?
consultive group consensus
what are the steps in wide band delphi?
- choose team
- kickoff meeting
- indiv prep
- estimation session
- assemble tasks
- review results
what are the 2 approaches in ad hoc?
- pricing to win
-parkison’s law
what is empirical model?
- cost estimation based on available data & skill
emperical model predicts effort as a fucntion of ______
LOC
parameter values of empirical models tend to be ______
organization dependent
what are the 3 catagories of projects in COCOMO?
- simple - organic small
- intermidiate - semi-detached
- complex - embedded large
what is a man-month estimate?
unit of work done by 1 man in 1 month
COCOMO estimates effort in terms of?
man-month
staffing reqs are small during?
- reqs & design
- final phases
staffing reqs is maximum during?
Implementation & testing
what are the 3 methods to determine financial value of a project?
- NPVA
- ROI
- PBA
how does NPVA calculate?
calculates monetary gain or loss by discounting all future cash outflows & inflows to present point in time
higher NPVA is bad
false
NPVA calculates ______ with ______ for each period of an investment?
cost with benefit
what is used to evaluate efficiency of an investment?
ROI
how does ROI work?
by measuring amount of return relative to investment cost
what is payback analysis?
mathematical methodology used to determine payback period for an investment
what is payback period?
amount of time it takes to recoup investment in net cash flows
when does payback occur?
when cumulative benefits & cost are greater than 0
