It is worthwhile to mention that replacement of ℓ1-norm with ℓ2-norm, which is faster to implement, does not necessarily produce reasonable solutions.
MaxSim is straightforward to implement, does not require any parameter tuning, has been well studied [34, 35], and is intuitively simple.
It is easy to implement, does not make use of derivatives and it can be applied to unconstrained or constrained problems.
The method has a number of advantages: It makes use of well-known techniques, is straightforward to implement, does not require species absence data, produces georeferenced digital maps for visual analysis and geographical identification, and can be adapted to any scale of analysis or data resolution.
This surveillance strategy, though easier to implement, does not sample high risk groups such as MSM, intravenous drug users and commercial sex workers and thus underestimates the true HIV prevalence figure for the country.
Measures that include these components are therefore going to be hard to implement, turning into a road block to 'treat to target', whereas a patient questionnaire as part of the structure of medical care is easy to implement, does not take extra time from the physician and seems to be equivalent to any other measure [ 12].
However, the majority are very tedious to implement or do not take the specific characteristics of the system into account.
The Federal Trade Commission, for example, saw its authority increased after a judicial decision that called into question its authority to implement its "Do Not Call" regime.
While these methods are relatively straightforward to implement, they do not easily accommodate missed or unscheduled visits while allowing for a time-varying treatment effect.
Perhaps the effort to implement was done too soon, ahead of any work done to achieve levels 1 and 2 of Grol's model [ 21, 22] – "orientation" and "insight" – in the recruited organizations.
