Reduce/replace loops in my conditional checks ? [CoreData]

I am looking to integrate my code with CoreData. Presently I have the following of which allows a worker to check their requirements against an advert e.g. if the worker needs x3 sponges to clean a bathroom, then the advert must provide those sponges, but the worker can only work on set days:

Code Block swift
var cdExample: [CleaningRota] = [bathroomMonday, kitchenFriday]  //
[Full sample code](https://developer.apple.com/forums/content/attachment/648c2166-46f3-44a3-bfc7-5e36f3d38721){: .log-attachment}
CORE DATA EXAMPLE
    let personAvailable: [Person] = [kath, mavis]
    //CORE DATA EXAMPLE : WORK ON OFFER
    for work in cdExample {
        //WORK TOOLS PROVIDED ON SITE
        for toolsAvailable in work.tool {
            //PERSONS AVAILABLE TO WORK
            for person in personAvailable {
                //PERSONAL REQUEST : SPECIFIC WORK DAY
                if person.avilability == work.day {
                    //CHECK PERSON TOOL REQUIREMENTS FOR JOB
                    for personRequirement in person.materialsNeeded {
                        //CYCLE THROUGH TOOLS WORKER NEEDS ON SITE
                        if personRequirement.tool == toolsAvailable.name {
                            //CONFIRM TOOLS WORKER NEEDS ARE FULLY PROVIDED
                            //AVOID CHECKING SAME STOCK TWICE IF CONDITION PREVIOUSLY MET
                            if personRequirement.quantity <= toolsAvailable.stock && personRequirement.met == false {
                                print(">>0> \(person.name)")
                                print(">>1> \(personRequirement.tool) : \(personRequirement.quantity)")
                                print(">>2> \(toolsAvailable.name) : \(toolsAvailable.stock)")
                                personRequirement.met = true
                                person.materialID.append(toolsAvailable.id)
                            }
                        }
                    }
                }
            }
        }
    }

As the adverts and requirements pile up this kind of system will not scale very quickly. I would like to know if there is a better way to model this data, or to check conditions.

I plan to pull the cdExample from CoreData, and am unfamiliar with using it. Being a proprietary Apple Framework I do not know if anyone will help me here, but if not then how best to achieve what I want without a pyramid of doom (which I don't mind), is there a better way please?

I also need to remove the stock, which I ran into trouble with as I had too many loops and hit a bug in Xcode, so I think I'm doing something wrong with all of these loops ?

Code Block 
            for person in personAvailable {
                //PERSONAL REQUEST : SPECIFIC WORK DAY
                if person.avilability == work.day {

Code Block 
            for person in personAvailable where person.avilability == work.day {
                //PERSONAL REQUEST : SPECIFIC WORK DAY

Code Block 
        for person in personAvailable where person.avilability == work.day { 
              for personRequirement in person.materialsNeeded where personRequirement.tool == toolsAvailable.name && personRequirement.quantity <= toolsAvailable.stock && !personRequirement.met {

Code Block 
            for person in personAvailable {
                if person.avilability == work.day {
                    for personRequirement in person.materialsNeeded {
                        if personRequirement.tool == toolsAvailable.name {
                            if personRequirement.quantity <= toolsAvailable.stock && personRequirement.met == false {