The Baby Sleep Revolution Program is most likely to work if your little one's excessive night wakefulness is caused by a Disrupted Sleep Pattern / lower than optimal sleep pressure, and if you are able to effectively implement this approach.
Disrupted Sleep Patterns are a very common cause of excessive wakefulness in babies and toddlers over 5 months of age, but they are not the only cause. It is possible that an underlying health or developmental condition may be causing or contributing to wakefulness - these can include, but are not limited to feeding/digestive issues, allergies & intolerances, sleep apnea and some neurological conditions. It is therefore important that if you have ANY concerns regarding your little one's health or development, you investigate with a healthcare professional before considering any sleep solutions. It is also possible that your little one's wakefulness is normal. It is normal for babies and toddlers to wake at night to feed, or if they're unwell or in discomfort for example. Some will wake more often than others.
You must also be able to commit to implementing this solution. This includes you and anyone else caring for your child being able to stick to specific sleep times, and waking your little one in the mornings and from naps if/when necessary during the process in order to reset their sleep pattern to a more natural rhythm.
The aim of this approach is to help you achieve restful nights with minimal wakes and fast settling & resettling. It is very normal for babies and toddlers to wake at night and need help, and most will still wake at least once, if not a few times (for a quick feed, for example) after this approach has been successful.
This approach is not a guaranteed 'sleep through the night' solution. Nor will it allow your child to sleep 'independently' if they are not developmentally ready to do so. If this is what you're aiming to achieve, then this is not the right program for you (though to be honest, there is unlikely to be any non-sleep training solution that will get you this 'fairytale' result!).
Please watch the video near the top of this page for more information on Disrupted Sleep Patterns and whether that's what is likely to be causing your little one's wakefulness, plus further details on whether or not this program is likely to work for you and your little one.