In the absence of delineated objective data, studies and interviewees frequently drew on qualitative but also subjective or anecdotal data and theoretical or policy discussions to draw conclusions.
Mae'r ymgeisydd wedi darparu ychydig iawn o ddadansoddiad, neu ddadansoddiad aneglur neu afrealistig, o'r amser a'r costau gofynnol mewn perthynas ag ymgysylltu ac ymgynghori.