The fourth intervention point (see Figure 2) is in selecting the tools that will be available to the users. Tools range from the highly restrictive, which limit the users’ choices and thereby reduce ambiguity and complexity, to the highly unrestrictive, which require the user to have more expertise.
Most units that were successful with data marts preferred restrictive tools
for accessing the data, but the unit that was successful with the single repository rejected restrictive tools.
Those users wanted the greater flexibility offered by the unrestrictive tools, and were willing to expend additional effort for more capability.