"make it difficult to implement" is an appropriate phrase to use in written English.
It is typically used to indicate that a certain process or task is challenging. For example, "The complex regulations make it difficult to implement the policy."
However, the ontologic and polyhierarchical nature of the SNOMED CT concept model make it difficult to implement in its entirety within electronic health record systems that largely employ object oriented or relational database architectures.
A customer might bring you a good idea, but sometimes at first you only see the practical problems which make it difficult to implement.
The underlying data models make it difficult to implement transactions in NoSQL databases.
However, the iterative, sequential operations of global algorithm still make it difficult to implement in median-scale FPGA.
Unfortunately, high hardware complexity and cost make it difficult to implement MRT because it demands baseband digital signal processing (DSP) for each antenna element.
The variety in the quality, substance, and coverage of the standards make it difficult to implement green building certification systems in these countries.
Since the issue of crisis support outside office hours by the therapist makes it difficult to implement ST in regular practice and its effect has never been examined, we decided to investigate the role of the crisis support outside office hours in the implementation study by randomly allocating the crisis support outside office hours to 50% of the therapists.
The security situation in Afghanistan still makes it difficult to implement infrastructure projects.
As Denis Bugrov, the senior vice-president for strategy, says, this "Russian nesting-doll architecture" raised overhead costs and made it difficult to implement strategy.
Cincinnati's criminal-justice system is swamped by low-level, nonviolent misdemeanors, which makes it difficult to implement proven risk-needs assessments on those high-risk offenders that C.I.R.V. targets, and to focus on evidence-based interventions.
Unavailability of velocity sensors makes it difficult to implement this simple control logic.
