The phrase "inability to guarantee" is a correct and usable phrase in written English.
You can use it when referring to something that cannot be confidently assured. For example, "Due to staffing issues, we are unable to guarantee a timely response to your inquiry."
Still, Boeing's inability to guarantee a delivery schedule "is a bit worrisome," said Troy J. Lahr, an analyst at Stifel, Nicolaus & Company in Baltimore.
The attorney general's inability to guarantee a verdict is not a flaw; it is what makes a trial valuable--not a show trial.
"In addition to his inability to guarantee delivery dates and cost estimates, Phyfe was seemingly unconcerned with providing prospective customers with precise and attractive renderings of the furniture available," Mr. Brown and Mr. Thurlow write.
The post office's ability to compete in the federal shipping market is hampered by several factors besides its late entry, the report found, including an inability to guarantee two- to three-day delivery service and to be as flexible in setting prices as its competitors.
One of the major limitations of simulation techniques is its inability to guarantee optimality of the developed solution.
The disadvantage of such strategies is the capital investment and time required to achieve successful rehabilitation and an inability to guarantee elimination of this carbonaceous waste.
Named, proprietary techniques were excluded because it was felt they were not uniformly available in the U.S. Herbs and nutraceuticals were also not permitted in this study due to the investigators' inability to uniformly guarantee the quality and potency of these products.
It has also highlighted the inability of producers to guarantee the ingredients in processed meat products.
Inability to secure external finance (23%).
In the case of video streaming, the inability of wireless networks to guarantee the required bandwidth and QoS for the services has boosted the development of novel video coding and adaptation solutions to improve the robustness and QoS for video transmission.
If the world decisively moves--as it is already gradually moving--away from market allocation of natural resources to political allocation and so-called resource nationalism, then the inability to project sufficient power to guarantee access to key resources will itself curtail that access, weakening the economy that supports that military strength.
