14th Dec 2007
• Why SWIS?
• The problem
• Our competitors
• Our solution and targeted market
• Product overview
• Our design
• Live demonstration
• Production timeline
• Short-range :
Suitable for enclosed environments and built
Reduce clutter and obstruction due to wiring.
Simple implementations that achieve practical
Products that solve common daily problems.
• Aron McKinnon, the Chief Executive Officer
(CEO) of SWIS
• Raymond Tan, the Chief Technology Officer
(CTO) of SWIS
• Peter Chen, Chief Quality Assurance Officer of
• Customers sometimes wait for extended
periods of time to be served.
• Due to failure of being alerted, service
providers otherwise kept busy, are left idling
• Decreased productivity due to time wastage
resulting from lack of communication.
• Decrease in productivity may ultimately lead
to lower income and poor customer appraisal.
• Mainly hospitality environments:
– Old age homes
– Department Stores
• Therefore, these are our target consumer
Our Competitors’ Designs
• High-tech solutions :
touch screen order menu.
X costly investment
• The “WaiterCaller” wireless paging system
alerts a waiter to a table’s request
X does not identify purpose of paging
X does not enable waiter to update the kitchen
• Designing a short-range wireless product for
numerous consumer venues/ hospitality
• Allows customer to electronically page
individual service providers for attention.
• Added feature of allowing internal
communication amongst service providers.
• Allow page request display in order to reduce
unproductive travelling time.
• A prototype design customized to cater for a
• SWIS SerCal (Server Caller)
• Example scenario : Restaurant
• Bluetooth wireless scheme
• 3 component units
• Kitchen Unit:
Central communication hub. (Computer)
Updates waiters on customers paging and
• Server Unit:
Portable Unit (eg. PDA) carried by waiters
Displays customer & kitchen paging status
Updates kitchen on table orders.
• Table Unit:
Pages for waiters’ attention
How the SerCal Works
SerCal Table Unit
Logitech V270 Bluetooth wireless mouse
-Bluetooth 1.2 wireless technology
-Adaptive frequency hoping
-Battery life up to 2200 hours
-Features low battery indicator light
-1000 dpi optical engine
-Uses 2 AA batteries
-3 push buttons with scroll wheel function
Pushbuttons (final design):
NKK single element DPDT LED UB series
-Double pole double through
-PCB mountable with gold contacts
-Power level 5A at 30V DC
-Dielectric strength 0.4VA
-Mechanical life > 1000000 operations
-Electrical life > 10000 operations
-Operation temperature -25 – 50 degrees Celsius
-LED rating: 1.85V at 20mA
• Two parts:
• The kitchen software is responsible for
– Receiving signals from the Table Units
– Relay the signals to the desinated Server Unit
– Receive orders from the Server Unit
• The Server software will:
– Allow the user to take orders and send to the
– Receive signals from the Kitchen Unit that tells the
server what table is in need.
Did Table 1 Did Table 2
yes yes yes
Input the number
Display which and type of orders Display which
request is called. the customer request is called.
No Store the
Did Kitchen different orders
Call? for different
Display which Send out request
Table is ready 3 for Kitchen Unit
from the kitchen. through Bluetooth.
from Kitchen Unit?
Implementation & training
• Users will be instructed by SWIS engineers, or
use the device under the supervision of SWIS
• Manuals will be provided, which include:
• The customer manual
for an audience with minimal technical expertise
one page leaflet with proper instrument care and
sensor placement information
Implementation & training
• Server worker manual
for an audience with general experience with
provide training for complete device usage of two
modules: Table Unit and Server Unit
• Service crew manual
for an audience with expertise in electronic device
complete training, setup, troubleshooting, and
device characteristics information for all three
modules: Table Unit, Server Unit and Kitchen Unit.
Component price quantity subtotal
Logitech V270 $27.50 2 $55
Tungsten E2 palm $244 1 $244
Blue tooth Dongle $20 1 $20
Toggle switches $4 4 $16
Misc. ( LEDs, casing, $10 - $10
• Engineering Science Student Endowment
Fund of $50
• Remaining costs were borne by SWIS.
Why SWIS SerCal?
• Greatly reduces redundant waiting time
• Effective and efficient use of resources
• Real time request/status updates (important
for time critical services, ie. hospital)
• Increased productivity
• Improve customers’ impression!
We would like to thank the following people:
• Dr Andrew Rawicz for his guidance, suggestions and
endorsement of funding from the engineering
science endowment fund.
• Mr Mike Sjoerdsma for imparting us with valuable
knowledge on project documentation and
• Mr Brad Oldham and Ms Lisette Paris Shaadi for
taking time off to cater for consultation sessions and
providing advice with regards to our design