Cisco Cisco Customer Response Solution Downloads Guía De Diseño
4-4
Cisco Unified Contact Center Express Solution Reference Network Design, Release 4.1
Chapter 4 Basics of Call Center Sizing
Principal Design Considerations for Call Center Sizing
Principal Design Considerations for Call Center Sizing
illustrates the principal steps and design considerations for sizing a call center.
Figure 4-2
Unified CCX Design Process – Call Center Sizing
is a general overview of the design considerations for call sizing. For a detailed description
of the call center sizing design process, refer to the section on sizing call center resources in the Unified
Contact Center Enterprise Solution Reference Network Design (SRND) for Cisco Unified Contact
Center Enterprise, available online at
Contact Center Enterprise Solution Reference Network Design (SRND) for Cisco Unified Contact
Center Enterprise, available online at
There are similar basic call center sizing considerations and steps for Unified CCE, and they also can be
used in sizing a smaller contact center for Unified CCX. This call sizing approach will provide you with
the minimum number of IVR ports to support the total BHCA.
used in sizing a smaller contact center for Unified CCX. This call sizing approach will provide you with
the minimum number of IVR ports to support the total BHCA.
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Si
z
in
g
BHCA Seen at
Queue Ports
Average Queue
Time (AQT)
Busy Hour Traffic
(BHT) In Erlangs
% Blockage
(Grade Of
Service)
Avg. queue duration
from ErlangC
calculator
from ErlangC
calculator
BHT=(BHCA * AQT
seconds)/3600 (for all\
duration types)
duration types)
BHT = (BHCA * AQT
seconds/3600 (for all
duration types)
duration types)
% Blockage
(Grade Of
Service)
BHCA seen at
IVR ports
Erlang Load on
IVR port.
Call Center
INPUT
Call Center
OUTPUT
BHT=(BHCA * IVR Port Time)/3600
% calls blocked when no ports
available( lowest % possible)
available( lowest % possible)
Busy Hour Traffic=(BHCA * AHTsec)/3600
(Erlangs)
% Blockage = 0.01 (1% for PSTN Trunks)
= 0.001 (0.1% for IVR Ports)
# IVR
Ports for
P&C
BHCA (T): Total Busy
Hour Call Attempts
Use Erlang C Calculator
Use Erlang B Calculator
Use Erlang B Calculator
# Agents
# IVR
Ports for
Q’ing
Queued
Calls
(%)
Avg. Q-Time
Total #
IVR
PORTS
Average Hold
time for IVR Port
Includes Prompt Playout/
Menu Navigation(if any)
Menu Navigation(if any)
Size Unified
CCX Agents
Size IVR Ports
for Queueing
Size IVR
Ports
AHT for call
treatment
BHCA for call
treatment
BHCA (T)
AHT (secs)
Service Level
Goal (% in secs)
Unified Contact Center