The phrase "entail a challenge" is correct and usable in written English.
You can use it when you want to express that something requires or involves a challenge. Example sentence: Taking a course in organic chemistry would entail a challenge, but it would be worthwhile in the long-run.
Facebook's announcement entails a challenge to Google, which already targets some ads on sites around the web, based on what it knows about people from their use of Google Plus and YouTube.
The partnership entails a challenge designed to identify the best candidates in Udacity's self-driving car engineer nanodegree program.
Resistance entails a challenge to the status quo in attempts to protect one's self and values [ 29].
In this regard, if a complete terminal is individually developed by a single manufacturer, its integration into an existing MTDC grid might entail a significant challenge, since it must be compatible with the rest of terminals connected to such grid, which would be produced by other manufacturers.
In private sector, indeterminate uncertainty seems to entail a two-fold challenge: While it is generally problematic to grasp the impacts of an innovation during early-phase R&D (the Collingridge dilemma), innovators are nevertheless expected to quickly yield tangible results.
Transformation of engineering undergraduate programs towards global practice of outcomes based accreditation (OBA) entails a huge challenge to universities as there is mounting pressure for infusion of desirable and yet measurable graduate competencies into its offered programs in order to fulfil professional bodies accreditation criteria.
This level of assistance usually entailed a great challenge for the supporting person, and required close cooperation with health care providers.
As in August, I think we have to be willing to treat both the fever and the infection and, if you step back a second, the appropriate policy response to this set of challenges will entail a mix of measures.
However, the associated uniparental incubation entails a higher energetic challenge due to constraints in time that can be spent off the nests [5] and/or may have consequences for the development and condition of the offspring due to the intermittent nature of incubation [11].
This entails a managerial alignment challenge translating macro level quality definitions into different local contexts.
