Process new paperwork so that you create a digital version right away â or, when starting with a digital version, print a paper copy if necessary â and then file the paper copy away and work from the digital copy to save yourself time and trouble. Print updated paper copies of files as you need them.
Referential integrity is a database constraint that ensures. that references between data are indeed valid and intact. Referential integrity is a fundamental principle of database. theory and arises from the notion that a database should not. only store data, but should actively seek to ensure its qual-. ity. Here are some additional definitions that we found on. the Web. â¢ âReferential integrity in a relational database is consis-. tency between coupled tables. Referential integrity is. usually enforced by the combination of a primary key. and a foreign key.
Therefore, some reasonable rate must be established for the selection criteria (step 4) of the engineering economy study ( Figure 1â1 ). The Minimum Attractive Rate of Return (MARR) is a reasonable rate of return established for the evaluation and selection of alternatives. A project is not economically viable unless it is expected to return at least the MARR. MARR is also referred to as the hurdle rate, cutoff rate, benchmark rate, and minimum acceptable rate of return. Figure 1â12 indicates the relations between different rate of return values. In the United States, the current U.S. Treasury Bill return is sometimes used as the benchmark safe rate.