def METHOD_NAME(disk_image, driver_type):
    '''
    Compute expected timeout value for image. Use value of 10s as default
    timeout for very small images (where delay in image check launch could
    cause the VM to fail to start. Use precomputed value in cases required
    timeout is bigger than 10 seconds.
    '''
    default_timeout = float(10)
    image_size = getImageSize(disk_image, driver_type)
    image_timeout = float(image_size * TIMEPERGIB)
    if image_timeout > default_timeout:
        return image_timeout
    return default_timeout