I am living in America, and the mosque in our city is very keen to organise activities to serve the community here, but I feel that everything is subject to programming, and there may be no need for that or it may not be permissible. For example, Fajr, Maghrib and ‘Isha’ prayers are programmed to always be fifteen minutes, and if the imam differs from that, the administration may rebuke him in a way that is not befitting to the position of the imam. The matter has gone so far that if we come late to the prayer, they say that it does not matter because the imam may be in such and such a rak‘ah. One of my friends worked out the timing for ‘Isha’ prayer: it is always five minutes for the first rak‘ah, five minutes for the second rak‘ah, and five minutes for the last two rak‘ahs combined.

Is this permissible, for the prayer to be divided like that and for the imam to be obliged to always make it fifteen minutes?

Praise
be to Allah.

The Muslim – whether he is an imam or praying behind an imam – should
always be keen to pray as the Prophet (blessings and peace of Allah be
upon him) used to pray, in accordance with the words of the Prophet
(blessings and peace of Allah be upon him): “Pray as you have seen me
praying.” Narrated by al-Bukhaari (631). And he should not introduce
anything into the prayer, especially that for which there is no basis in
the religion of Allah and that was not the practice of the people before. 

Shaykh al-Islam Ibn Taymiyah (may Allah have mercy on him) said: The best
for the imam is to strive to emulate the way in which the Messenger of Allah
(blessings and peace of Allah be upon him) used to lead his companions in
prayer. In fact this is what is prescribed and is enjoined by the leading
scholars… So the imam should usually do what the Prophet (blessings and
peace of Allah be upon him) usually did, then if there is an interest to be
served by making it longer than that or shorter than that, he may do that,
as the Prophet (blessings and peace of Allah be upon him) used to sometimes
make the prayer longer or shorter. 

End quote from Majmoo‘ al-Fataawa (22/315-318) 

From what has been mentioned about the prayer in the mosque referred to,
there are several things that are contrary to the Sunnah, including the
following: 

Firstly:

 Programming every prayer to be at a specific time is undoubtedly contrary
to the Prophet’s Sunnah; moreover, it is an innovation that was not the
practice of the earlier generations and is not known from the imams of
guidance and leading Muslim scholars throughout the ages – as far as we know
– rather what is known is something other than that. 

Secondly: 

Making Fajr prayer equal in length to Maghrib and ‘Isha’ prayers is contrary
to the Sunnah that has been narrated from the Messenger of Allah (blessings
and peace of Allah be upon him). 

The usual practice of the Prophet (blessings and peace of Allah be upon him)
was to make Fajr prayer lengthy, ‘Isha’ prayer moderate in length and
Maghrib prayer brief, as it was narrated by an-Nasaa’i (982) from Sulaymaan
ibn Yasaar that Abu Hurayrah said: I have never prayed behind anyone whose
prayer more closely resembled that of the Messenger of Allah (blessings and
peace of Allah be upon him) than So and so. Sulaymaan said: He used to make
the first two rak‘ahs of Zuhr lengthy and make the last two brief, he made
‘Asr brief, he recited the short soorahs of al-Mufassal in Maghrib, he
recited the medium soorahs of al-Mufassal in ‘Isha’ and he recited the
lengthy soorahs of al-Mufassal in Fajr.

Classed as saheeh by al-Albaani in Saheeh an-Nasaa’i. please see also
the answer to question no. 162900 

Thirdly: 

Making the first rak‘ah of ‘Isha’ or any other prayer the same as the length
of the second rak‘ah, and defining that in terms of minutes, is also
introducing something that is contrary to the Sunnah, because what the
Prophet (blessings and peace of Allah be upon him) usually did was to make
the first rak‘ah longer than any other. Please see the answer to question
no. 171060.

Fourthly: 

Making the imam persistently perform the prayer in a manner that is contrary
to that which is narrated in the Sunnah, and taking him to task if he goes
against that is – in addition to going against the Sunnah – is disrespectful
towards the one who is leading you in the prayer and obliging him to do
something that he is not obliged to do; it is contrary to the status of the
act of worship and to what is expected of honouring the one who stands
before the worshippers to lead them in prayer, who should be one of the
people of the people of the Qur’an or should be the most knowledgeable of
the worshippers about the Qur’an. It is turning away from all of that and
making it more like purely routine administrative work. So it becomes like a
job with rules and regulations that the imam may have to put up with for the
sake of what he gets of a salary and a livelihood. 

What you should do is advise the administration of the mosque and come to
some agreement with them concerning this matter, on the basis of wisdom and
kindness, so that the mosque will be paying attention to the Sunnah in the
best manner and adhering to it. 

With regard to defining the time between the adhaan and iqaamah for each
prayer in a way that will best serve the interests of all, it does not seem
to us that there is anything wrong with that; in fact most of the mosques do
that, setting a time for the iqaamah, so that the people will know the time
of the prayer and will not miss it.

For more information on that, please see the answer to question no.
160000

And Allah knows best.