Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Communication Breakdown; Situational Awareness
Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Descending via the DSNEE1 arrival into LGB I asked FO (First Officer) if he was going to make the crossing restriction at AASPN. He said yes. ATC then asks if we are going to make the restriction I say 'yes sir'. We missed restriction by 500 ft. ATC did not say anything but we decided to fill out a report.As the Captain I should have been more direct with the FO and command him to descend at a better rate. He did not have the situational awareness to know he was going to be high. I need to make sure the aircraft crosses the restriction at the lowest altitude not somewhere in the middle or the top altitude.
Air carrier Captain reported missing a crossing restriction after the First Officer assured him they would make it.