Initially. Each smartphone has to have name; credit card details;
Fixed Costs; Desired Profit; Months Open; Idle time rate; Leveraged time rate (Twist™);
Up to 10 of each - workers, rate & markup, standard materials costs & markup.
For each scenario: Hours effort per worker (incl. you); tweak materials costs & markup.
Markup both labour and materials. e.g. 100% mu = 50% gross profit;
Don't confuse markup, gross profit and cash.
Realise that Twist™ can be very profitable if other jobs are waiting. A worker may do 40 hours but you charge out 60.
Only have top class workers. Recognise idle time e.g. using Facebook, running errands.
Charge for ALL materials with a margin even if the client is given a total price quote.
Realise how much you need to quote overall is very much dependent on
what the mark up is on the labour.
Let Tradie Gauge™ work out breakeven & covering overheads
& desired profit.
Reasonably Accurate
Lookback™ You can compare what you planned to do with what actually
happened. This Lookback™ process enables you to fine tune the settings. Essentially, you can improve.
Client Acceptance Ideally, give the client an 'all up' quote. You'll need line items for the 'customer from hell' who demands trivial detail.