Nigel Adkins admits he doesn't know how long he will be given to turn Saints' fortunes around.
The manager watched as his side capitulated in the second half at Upton Park, losing 4-1 to West Ham.
Saints are now back in the relegation zone, with just four points from eight games and the worst defensive record in the Premier League, having now conceded a total of 24 goals.
All that has led to further speculation that Adkins' job could be under threat.
Asked how long he thinks he will have to turn things around, the he said: "Honest answer? I don't know. That is football, I am being brutally honest with you.
"There is a vision at the football club to play a certain brand of football by passing the ball.
"There needs to be stability at any football club, which is important. But I am not naive as it's football and football is a results-driven industry.
"We've got a process in place that we're doing our best to adhere to, but you've got to win games of football.
"You've got to keep it out at one end and stick it in at the other end.
"On too many occasions this year in the Barclays Premier League, we've not kept it out of our net and I am being up front and honest with you."