Evaluating delay for Xbee I will explain my task in a simplified way. I'm communicating among 3 Xbee's. 

The attached code is for the sender Xbee. This Xbee actually sends multiple values of value1 (here for simplification I assigned it to constant value 10). For finding the value1 it does some other calculations as well and then assigns it. 

But I find that if I reduce or remove the delay(100) I end up receiving improper values. I guess delay gives a buffer time for data transmission but my question is how to do I calculate the minimum delay or how can justify that this is the delay needed ? 

I hope you can understand my question. If not please comment I will give some more pertinent details.

  // Sender Xbee
    void setup()
    {
    Serial.begin(9600);
    }
    void loop()
    {
    int value1 = 10; // some hardcoded values to send
    Serial.print('H'); // unique header to identify start of message
    Serial.print(value1,DEC);
    Serial.print(","); // note that a comma is sent after the last field
    Serial.print('\n'); // send a cr/lf
    delay(100);
    }
Based on my experience with Xbee, I would say the limit is 50ms as Xbee can do the lowest sampling rate of 50ms.