Assignment $4$: Create a Sequence Diagram for this company.

Acme Electric LLC

The company

Acme Electric, LLC $($Acme$)$ is a local electrical company that does all phases of electrical

work including residential, commercial, outdoors, new and remodel as well as service work.

They service Duval, Clay, St$.$ Johns, Nassau, and Baker counties, in Florida and are

available six days a week from $8$:$00$ am to $6$:$00$ pm$,$ and Sundays by appointment. They are

always available for free estimates and emergency calls.

The people

Tom is the owner and has three crews of two people each. Each crew is assigned their

own van. On each crew, one person is designated as the crew$$s team leader$/$electrician and

the other an electrician. Tom himself sometimes acts as a crew of one electrician using his

truck. There is one supply$/$maintenance person $($Supply$)$ who is responsible for ordering,

stocking, and maintaining electrical parts and supplies as well as maintaining the

company$$s vehicles.

The vehicles

Currently the company has three Ford E$250$ vans and one Ford F$250$ truck. Each team

leader is assigned a vehicle. The Ford F$250$ truck is assigned to Tom.

The Jobs

The company has several categories of Jobs $$ commercial vs$.$ residential and planned vs$.$ ad

hoc. Normally all the commercial Jobs are planned, while the residential Jobs are a mix of

planned and ad hoc. The customers are categorized as $$new$$ or $$existing$.$

The workday:

Start:

Each workday morning the crews arrive at Tom$$s shop to prepare for the day. Tom gives

each crew:

$1.$ A list of Jobs by crew that the crew is to work on that day, and the order that

Tom wants them completed.

$2.$ A list of material for each Job, aka a Bill of Materials $($BOM$).$ The crew

then either pulls the BOM from the stock room or Supply tells them

what, when, and where to pick up the BOM or partial BOM from a $3$rd

party electrical supply store. A $3$rd party electrical supply store may deliver

additional BOM directly to the Job site.

$3.$ Any special instructions about each Job.

$4.$ Any special instructions about their day$$s itinerary.

Supply maintains a stock of electrical parts and supplies via an Inventory. Prior to leaving

Modified on $1/3/24$ Page $2$ of $9$ pages

the shop, Crews obtain from the Inventory, electrical parts and supplies they anticipate

needing that are not pre$-$stocked in their vehicle. If Supply or the Crews$$ vehicle is missing

needed parts or supplies the team leader will determine if they should:

$$ Request Supply provide the needed items to the Job site.

$$ Request a $3$rd party electrical supply store provide the needed items to the Job site.

$$ Pick up the needed items at either Supply or a $3$rd party electrical supply store later.

Each electrician provides their own personal tools for use on a job. These are items like

screwdrivers, hammers, tool belt, etc. $-$ Acme provides no personal tools.

During:

Tom maintains contact throughout the day with crew$$s team leader via a smartphone. They

use text as well as voice to communicate. The team leader uses a map application on the

smartphone for mapping to locate Job sites.

The company contracts with a $3$rd party vehicle maintenance company to maintain their fleet

of vehicles. Assigned drivers report immediately to Supply when they detect any possible

vehicle issues that might require immediate or emergency repairs. Supply calls the $3$rd party

vehicle maintenance company to schedule both normal maintenance and

immediate$/$emergency repairs.

End:

While returning to the shop, vehicle drivers are required to fuel their vehicles. Any time a

vehicle driver fuels a vehicle, they note the vehicle mileage, date, and time on the receipt. At

the shop they:

$1.$ Verbally report to Tom about their workday.

$2.$ Provide receipts to Supply for any items purchased, including but not

limited to$,$ fuel, oil, materials, supplies, special equipment, etc.

$3.$ Assigned drivers report the van$$s ending mileage to Supply.

$4.$ Each crew restocks their van from Inventory and notifies Supply of any items they

are unable to restock.

Definition of a Job

Tom may receive a verbal or written Request for Proposal $($RFP$)$ from an existing or

potential Customer. An RFP is a document written and sent by an existing or potential

customer detailing the requested service. Generically, it is a method through which a

business sends requests to a few contractors so that these potential contractors can create

and send proposals back to the Customer in response to the RFP$.$ When Tom receives

Modified on $1/3/24$ Page $3$ of $9$ pages

an RFP$,$ he prepares and sends a Proposal back to the requesting Customer. Tom$$s proposals

are in the form of a Job with a status of proposed. The Customer can accept one of

contractor$$s proposals. If the Customer accepts Acme$$s proposal, the Customer signs and

returns the proposal to Acme. Upon receipt of the signed proposal, Tom changes the Job$$s

status from proposed to accepted.

Each Job exists in exactly one status at any point in time. It may start out as a Proposed Job,

then mov