Table 4 Method characterisation categories by input resource requirements

Time

hours

(t ≤ a day)

days

(a day < t ≤ a week)

weeks

(a week < t ≤ a month)

months

(a month < t ≤ a year)

years

(t > a year)

Money

£tens

(m ≤ £100)

£hundreds

(£100 < m ≤ £1 k)

£thousands

(£1 k <m ≤ £10 k)

£10 thousands

(£10 k < m≤£100 k)

£100 thousands

(m > £100 k)

Knowledge

None

Limited

Moderate

Expert

Complete

Data

None

Guesstimate

Some raw

Good statistics

All types